{"id":2085,"date":"2023-11-23T12:59:45","date_gmt":"2023-11-23T15:59:45","guid":{"rendered":"https:\/\/eventos.abcm.org.br\/eptt2024\/?page_id=2085"},"modified":"2024-10-10T17:56:12","modified_gmt":"2024-10-10T20:56:12","slug":"programacao","status":"publish","type":"page","link":"https:\/\/eventos.abcm.org.br\/eptt2024\/programacao\/","title":{"rendered":"Programa\u00e7\u00e3o"},"content":{"rendered":"<div class=\"table__container table__lighten\">\n<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th style=\"text-align: center;\" colspan=\"2\">1\u00ba DIA: Segunda-feira 23\/09<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"tbl-accordion-header\">\n<tr>\n<td>08:30 \u2013 9:30<\/td>\n<td>Registro e recebimento dos kits<\/td>\n<\/tr>\n<tr>\n<td>09:00 \u2013 9:30<\/td>\n<td>Interven\u00e7\u00e3o art\u00edstica (Comit\u00ea de A\u00e7\u00f5es Culturais &#8211; FESJ\/UNESP)<\/td>\n<\/tr>\n<tr>\n<td>9:30 \u2013 10:30<\/td>\n<td>Cerim\u00f4nia de abertura<\/td>\n<\/tr>\n<tr>\n<td>10:30 \u2013 10:45<\/td>\n<td>Interven\u00e7\u00e3o art\u00edstica (Comit\u00ea de A\u00e7\u00f5es Culturais &#8211; FESJ\/UNESP)<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>10:45 \u2013 12:00<\/td>\n<td>Palestra: Prof. Jorge Peixinho (ENSAM \u2013 Paris)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Transition to turbulence in pipe flow and the effect of a wall-jet periodic disturbance<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nThe laminar flow in a straight pipe of circular cross-section leads to an elegant solution in the form of a<br \/>\nparabolic velocity profile. Many physicists and engineers have verified this velocity profile and the<br \/>\nassociated Hagen-Poiseuille pressure drop law. When the flow rate increases with a low level of<br \/>\ndisturbance at the pipe inlet, the flow stays laminar, even at large velocities. However, when<br \/>\ndisturbances are present or artificially added, a sudden transition to turbulence is observed. In this<br \/>\npresentation, we will describe the effect of various disturbances in pipe flow. Specifically, the effect of<br \/>\na wall-jet periodic injection through a small orifice in the wall, sometimes called synthetic jet, will be<br \/>\npresented and compared to other types of disturbances. In a second part of the presentation,<br \/>\nexperiments and numerical simulations of the transition to turbulence in pipes with expansions, smooth<br \/>\nof abrupt expansion, will be also examined with special attention to the role of the corner recirculation<br \/>\nregions on the transition to turbulence.<\/td>\n<\/tr>\n<tr>\n<td>12:00 \u2013 14:00<\/td>\n<td>Pausa para almo\u00e7o<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>14:00 \u2013 15:40<\/td>\n<td><a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Sess\u00e3o t\u00e9cnica<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td>14:00 \u2013 14:20 &#8211; <strong>EPTT2024-0007<\/strong> STABILITY OF LIQUID SHEETS IN FUEL INJECTORS<\/p>\n<p>14:20 \u2013 14:40 &#8211; <strong>EPTT2024-0027<\/strong> On the effect of turbulence modeling on the hemodynamics of intracranial aneurysms<\/p>\n<p>14:40 \u2013 15:00 &#8211; <strong>EPTT2024-0002<\/strong> PRESSURE FIELD IN A CENTRIFUGAL PUMP COMPUTED FROM PARTICLE IMAGE VELOCIMETRY<\/p>\n<p>15:00 \u2013 15:20 &#8211; <strong>EPTT2024-0015<\/strong> NUMERICAL INVESTIGATION OF NATURAL GAS MIXING THROUGH A CURVED SUPERSONIC SEPARATOR WITH GEOMETRY VARIATION AND CENTRIFUGATION<\/p>\n<p>15:20 \u2013 15:40 &#8211; <strong>EPTT2024-0052<\/strong> Neural Networks as Flow Controllers: a Study on Robustness<\/td>\n<\/tr>\n<tr>\n<td>15:40 \u2013 16:10<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>16:10 \u2013 17:25<\/td>\n<td>Palestra: Prof. Dwight Barkley (University of Warwick)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Transition to turbulence and statistical phase transitions<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\n&#8220;What we really cannot do is deal with actual, wet water running through a pipe. That is the central problem which we ought to solve some day, and we have not.&#8221; This statement by Richard Feynman captures how the seemingly simple motion of fluid through a pipe can present such an immense scientific challenge. After years of missteps, controversies, and uncertainties, we are at long last converging on a unified and fascinating picture of the transition to turbulence in flows such as pipes, channels, and ducts. I will discuss recent developments that have established a deep connection between transition in subcritical shear flows and a class of non-equilibrium statistical phase transitions known as directed percolation. I will review important results in the field with focus on the spatio-temporal nature of the problem and how universality manifests itself.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- segundo dia --><\/p>\n<div class=\"table__container table__lighten\">\n<p>16:25 \u2013 17:40Palestra: Prof. Elie Bou-Zeid (Princeton University)<\/p>\n<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th style=\"text-align: center;\" colspan=\"2\">2\u00ba DIA: Ter\u00e7a-feira 24\/09<br \/>\nSess\u00e3o especial em Camada limite atmosf\u00e9rica<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"tbl-accordion-tr\">\n<td>08:30 \u2013 10:00<\/td>\n<td>Palestra: Prof. Bruno Carmo (USP)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>The physics and mathematical modelling of the atmospheric boundary layer<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nThe atmospheric boundary layer (ABL) is the lowest part of the Earth&#8217;s atmosphere, directly influenced by surface interactions, such as heat, moisture, and momentum exchange. Its behavior is crucial for understanding weather patterns, pollutant dispersion, and wind energy resources. The physics of the ABL is governed by complex processes, including turbulence, buoyancy, friction, and shear. These processes lead to rapid changes in temperature, wind speed, and humidity over short vertical distances. The ABL is often characterized by turbulent mixing, where energy is transferred between different scales of motion. This turbulent flow is responsible for transporting heat, moisture, and momentum between the surface and the free atmosphere above. A key challenge in ABL modeling is the accurate representation of surface boundary conditions, which strongly influence the turbulence regime. This is typically done using parameterization schemes that model the fluxes of momentum, heat, and moisture based on surface characteristics like roughness and vegetation. In this talk we will discuss the physics and the mathematical modelling of this highly important flow, highlighting some of its most relevant concepts and paving the way for the next talks of this special session.<\/td>\n<\/tr>\n<tr>\n<td>10:00 \u2013 10:30<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr>\n<td>10:30 \u2013 10:45<\/td>\n<td>Interven\u00e7\u00e3o art\u00edstica (Comit\u00ea de A\u00e7\u00f5es Culturais &#8211; FESJ\/UNESP)<\/td>\n<\/tr>\n<tr>\n<td>10:45 \u2013 12:00<\/td>\n<td>Palestra: Prof. Marcelo Chamecki (UCLA)<\/td>\n<\/tr>\n<tr>\n<td>12:00 \u2013 14:00<\/td>\n<td>Pausa para almo\u00e7o<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>14:00 \u2013 15:40<\/td>\n<td><a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Sess\u00e3o t\u00e9cnica<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td>14:00 \u2013 14:20 &#8211; <strong>EPTT2024-0014<\/strong> Turbulence Modeling in Nonpremixed Sooting Flames: Entrainment Effects and Implications<\/p>\n<p>14:20 \u2013 14:40 &#8211; <strong>EPTT2024-0012<\/strong> Numerical Investigation of the Backward Facing Step Configuration Using ILES Methodology<\/p>\n<p>14:40 \u2013 15:00 &#8211; <strong>EPTT2024-0037<\/strong> Influence of the bed slope on axisymmetric gravity current propagation<\/p>\n<p>15:00 \u2013 15:20 &#8211; <strong>EPTT2024-0016<\/strong> A new CFD code for simulation of the neutral atmospheric boundary layer using the RaNS methodology<\/p>\n<p>15:20 \u2013 15:40 &#8211; <strong>EPTT2024-0032<\/strong> Resolvent analysis of coherent structures in the atmospheric boundary layer considering Coriolis effects<\/td>\n<\/tr>\n<tr>\n<td>15:40 \u2013 16:10<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr>\n<td>16:10 \u2013 16:25<\/td>\n<td>Interven\u00e7\u00e3o art\u00edstica (Comit\u00ea de A\u00e7\u00f5es Culturais &#8211; FESJ\/UNESP)<\/td>\n<\/tr>\n<tr>\n<td>16:25 \u2013 17:40<\/td>\n<td>Palestra: Prof. Elie Bou-Zeid<\/td>\n<\/tr>\n<tr>\n<td>17:40 \u2013 18:00<\/td>\n<td>An\u00fancio de patrocinador (VersatusHPC)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- terceiro dia --><\/p>\n<div class=\"table__container table__lighten\">\n<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th style=\"text-align: center;\" colspan=\"2\">3\u00ba DIA: Quarta-feira 25\/09<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>08:30 \u2013 10:00<\/td>\n<td>Palestra: Prof. Jo\u00e3o L. F. Azevedo (ITA)<\/td>\n<\/tr>\n<tr>\n<td>10:00 \u2013 10:30<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>10:30 \u2013 12:00<\/td>\n<td>Palestra: Prof. Fulvio Scarano (TU Delft)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Quantitative flow visualisation for the study of transition and turbulence<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nFlow visualisation has been one of the first approaches that reveal the complex flow patterns and dynamics occurring during flow transition and turbulence.<br \/>\nThe needed transformation of qualitative visualisations into quantitative measurements has initially required a dimensional downgrading (from 3D to planar and often point wise measurements).<br \/>\nThe advent of PIV has combined the ability to yield quantitative data with the observation of flow-field pattern. The constantly evolving velocity and vorticity patterns of transitional and turbulent flows could be captured, instantly and in a reasonably large measurement plane. The last two decades have 3D quantitative visualisation techniques emerging (Tomographic PIV, Lagrangian Particle Tracking) and their time-resolved variants (TR-TOMO-PIV and Shake-the-Box).<br \/>\nThe lecture presents the principles of such techniques in the context of transition and turbulent flow problems. A survey of applications is presented that ranges from roughness induced transition to turbulent skin friction control. An outlook describes the latest developments towards large-scale PIV by means of helium-filled soap bubbles (HFSB) for the study of complex problems directly in real-world conditions.<\/td>\n<\/tr>\n<tr>\n<td>12:00 \u2013 14:00<\/td>\n<td>Pausa para almo\u00e7o<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>14:00 \u2013 15:40<\/td>\n<td><a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Sess\u00e3o t\u00e9cnica<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td>14:00 \u2013 14:20 &#8211; <strong>EPTT2024-0026<\/strong> BOUNDARY LAYER TRANSITION AFFECTED BY A GAP<\/p>\n<p>14:20 \u2013 14:40 &#8211; <strong>EPTT2024-0013<\/strong> A Study of Explicit Algebraic Reynolds Stress Models Applied to Aerodynamic Flows<\/p>\n<p>14:40 \u2013 15:00 &#8211; <strong>EPTT2024-0021<\/strong> Investigation of Finite Wing Effects in Transitional Airfoil Flows Using the Lattice-Boltzmann Method<\/p>\n<p>15:00 \u2013 15:20 &#8211; <strong>EPTT2024-0024<\/strong> Analysis of Extreme Events in the Boundary Layer of a NACA0012 at High Angle of Attack<\/p>\n<p>15:20 \u2013 15:40 &#8211; <strong>EPTT2024-0054<\/strong> ON THE FORMATION OF A LAMINAR SEPARATION BUBBLE<\/td>\n<\/tr>\n<tr>\n<td>15:40 \u2013 16:10<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>16:10 \u2013 17:40<\/td>\n<td>Dr. Meelan Choudhari (NASA Langley Research Center)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>The Elephant in the Wind Tunnel: Reflections on Collaborative Approaches for Transition Modeling, from N-Factor Methods to the Transfer Function Tango<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nEm breve.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- quarto dia --><\/p>\n<div class=\"table__container table__lighten\">\n<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th style=\"text-align: center;\" colspan=\"2\">4\u00ba DIA: Quinta-feira 26\/09<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>08:30 \u2013 10:00<\/td>\n<td>Palestra: Prof. Roney Thompson (UFRJ)<\/td>\n<\/tr>\n<tr>\n<td>10:00 \u2013 10:30<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr>\n<td>10:30 \u2013 10:45<\/td>\n<td>Interven\u00e7\u00e3o art\u00edstica (Comit\u00ea de A\u00e7\u00f5es Culturais &#8211; FESJ\/UNESP)<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>10:45 \u2013 12:00<\/td>\n<td>Palestra: Profa. Laurette Tuckerman (ESPCI \u2013 Paris)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Patterns of Turbulence<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nA standing wave pattern appears on the free surface of a fluid layer when it is subjected to vertical<br \/>\noscillation of sufficiently high amplitude. Like Taylor-Couette flow (TC) and Rayleigh-Benard<br \/>\nconvection (RB), the Faraday instability is one of the archetypical pattern-forming systems. Unlike TC<br \/>\nand RB, the wavelength is controlled by the forcing frequency rather than by the fluid depth, making it<br \/>\neasy to destabilize multiple wavelengths everywhere simultaneously. Starting in the 1990s,<br \/>\nexperimental realizations using this technique produced fascinating phenomena such as quasipatterns<br \/>\nand superlattices. This sparked a renaissance of interest in Faraday waves, which led to new<br \/>\nmathematical theories of pattern formation. However, the Faraday instability has been the subject of<br \/>\nsurprisingly little numerical study, lagging behind TC and RB by several decades. We will discuss<br \/>\nsome of the exotic patterns found in recent numerical simulations. The first 3D simulation reproduced<br \/>\nhexagonal standing waves, which were succeeded by recurrent alternation between quasi-hexagonal<br \/>\nand beaded striped patterns, interconnected by spatio-temporal symmetries. In a large domain, a pattern<br \/>\nof square waves divides spontaneously into four subsquares with synchronized diagonal blocks or else<br \/>\ncan undergo a twisted sheared secondary instability. A liquid drop subjected to an oscillatory radial<br \/>\nforce comprises a spherical version of the Faraday instability. Simulations show Platonic solids<br \/>\nalternating with their duals while precessing.<\/td>\n<\/tr>\n<tr>\n<td>12:00 \u2013 14:00<\/td>\n<td>Pausa para almo\u00e7o<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>14:00 \u2013 15:40<\/td>\n<td><a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Sess\u00e3o t\u00e9cnica<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td>14:00 \u2013 14:20 &#8211; <strong>EPTT2024-0022<\/strong> DYNAMICS OF H2 BUBBLES BASED ON VELOCITY FIELDS DURING WATER ELECTROLYSIS<\/p>\n<p>14:20 \u2013 14:40 &#8211; <strong>EPTT2024-0042<\/strong> TURBULENCE CHARACTERISTICS ANALYSIS IN HORIZONTAL OIL-WATER CORE-ANNULAR FLOW VIA PARTICLE IMAGE VELOCIMETRY (PIV).<\/p>\n<p>14:40 \u2013 15:00 &#8211; <strong>EPTT2024-0025<\/strong> Linear Stability Analysis of Viscoelastic Boundary Layer Flows<\/p>\n<p>15:00 \u2013 15:20 &#8211; <strong>EPTT2024-0047<\/strong> STABILITY ANALYSIS OF OLDROYD-B FLUID PIPE FLOW<\/p>\n<p>15:20 \u2013 15:40 &#8211; <strong>EPTT2024-0028<\/strong> STABILITY ANALYSIS OF OLDROYD-B AND GIESEKUS FLUIDS JET FLOW: LST AND DNS.<\/td>\n<\/tr>\n<tr>\n<td>15:40 \u2013 16:10<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>16:10 \u2013 17:40<\/td>\n<td>Palestra: Prof. Javier Jim\u00e9nez (UPM)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Fake turbulence<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nTurbulence is a high-dimensional dynamical system with known equations of motion. It can be<br \/>\nnumerically integrated, but the simulation results are also high-dimensional and hard to interpret.<br \/>\nLower-dimensional models are not dynamical systems, because some dynamics is discarded in the<br \/>\nprojection, and a stochastic Perron-Frobenius operator substitutes the equations of motion. Using as<br \/>\nexample turbulent flows at moderate but non-trivial Reynolds number, we show that particularly<br \/>\ndeterministic projections can be identified by either Monte-Carlo or exhaustive testing, and can be<br \/>\ninterpreted as coherent structures. We also show that they can be used to construct data-driven \u2018fake\u2019<br \/>\nmodels that retain many of the statistical characteristics of the real flow.<\/td>\n<\/tr>\n<tr>\n<td>18:00 \u2013 19:00<\/td>\n<td>Assembleia ABCM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- quinto dia --><\/p>\n<div class=\"table__container table__lighten\">\n<table border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th style=\"text-align: center;\" colspan=\"2\">5\u00ba DIA: Sexta-feira 27\/09<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"tbl-accordion-tr\">\n<td>08:30 \u2013 9:30<\/td>\n<td>Palestra: Prof. Bruno Carmo (USP)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>Computational modelling and simulation of wind turbines and wind farm flows<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nComputational modeling and simulation of wind turbines and wind farm flows have become essential tools for optimizing wind energy production, understanding aerodynamic interactions, and predicting wind turbine loads. Wind farms operate in complex and dynamic atmospheric environments, where interactions between the rotor blades and wind flow, as well as interactions between multiple turbines, are influenced by turbulence, wake effects, and atmospheric boundary layer phenomena. To address these challenges, computational fluid dynamics (CFD) and other numerical approaches are used to simulate the flow around turbines and within entire wind farms. One of the key challenges in wind farm simulations is the modeling of turbine wakes. As wind flows past a turbine, it generates a wake characterized by reduced wind speed and increased turbulence. These wakes can significantly impact downstream turbines, reducing their power output and increasing mechanical loads. To simulate wake interactions within a wind farm, different methods are employed, including actuator disk models, which represent turbines as porous disks that induce a momentum deficit in the flow, and full rotor-resolved CFD simulations, which capture detailed aerodynamic effects. Large eddy simulation (LES) is often used to model turbulence in the wind farm, providing insights into the effects of atmospheric conditions on wake formation and propagation. In this talk, we will address the computational techniques employed to simulate the operation of wind turbines and wind farms using different degrees of fidelity. We will discuss the differences in level of representation of the physics that each approach is able to deliver, as well as their computational cost.<\/td>\n<\/tr>\n<tr>\n<td>9:30 \u2013 10:15<\/td>\n<td>Coffee Break e exibi\u00e7\u00e3o de p\u00f4steres<\/td>\n<\/tr>\n<tr class=\"tbl-accordion-tr\">\n<td>10:15 \u2013 11:30<\/td>\n<td>Palestra: Prof. Daniel Rodr\u00edguez (UPM)<br \/>\n<a class=\"toggle-table\" data-toggle=\"toggle\"><strong>New perspectives on instability of laminar separation bubbles: have we been missing something<br \/>\nimportant?<\/strong><\/a><\/td>\n<\/tr>\n<tr class=\"tbl-accordion-body\">\n<td><\/td>\n<td><strong>Abstract<\/strong><br \/>\nDecades of research have established the ubiquity of convective inflectional instability in laminar<br \/>\nseparation bubbles (LSBs) and its dominant role on the laminar-turbulent transition process. However,<br \/>\na plethora of additional dynamics including three-dimensionalisation of the mean flow, low-frequency<br \/>\nbreathing or self-excited vortex shedding have been observed as the key parameters, namely adverse<br \/>\npressure gradient, Reynolds number and incoming turbulence intensity, are varied; these additional<br \/>\ndynamics cannot be fully explained by convective instability alone. To fill these gaps, global instability<br \/>\nmechanisms of LSBs were proposed in the past, but most low- turbulence wind tunnel experiments<br \/>\neither did not find evidence of their presence, or attributed the possible evidences to by-products of the<br \/>\ninflectional instability.<br \/>\nThis talk will briefly revisit and depart from theoretically-predicted self-sustained linear instabilities of<br \/>\nLSBs [1]. First, a geometrical criterion for the onset of absolutely unstable inflectional instability will<br \/>\nbe proposed [2], based on the relative position of the inflection point and the separation streamline.<br \/>\nRecent results on non-linear and secondary instabilities of 3D separated flows will be then presented.<br \/>\nThey show that the spanwise distortion of the recirculation region, which is inherent to separated flows,<br \/>\nstrongly enhances inflectional instability, potentially leading to their absolute instability and to the<br \/>\nappearance of a self-excited global oscillator [3]. This sequence triggers the laminar-turbulent transition<br \/>\nwithout requiring any external disturbances or actuation, and also may define the dynamics in the<br \/>\npresence of low-amplitude free-stream disturbances [4, 5].<br \/>\nThe resulting LSBs agree well with those reported for low-turbulence wind-tunnel experiments without<br \/>\nactuation at comparable conditions, which suggests that the inherent dynamics described by the self-<br \/>\nexcited instability might have been present and overlooked. Finally, some recent experimental works<br \/>\nwill be discussed under the light of the theoretical results with the aim of offering an enlarged<br \/>\nperspective for future research.<\/td>\n<\/tr>\n<tr>\n<td>11:30 \u2013 12:00<\/td>\n<td>Encerramento<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h1>P\u00f4steres<\/h1>\n<p>&nbsp;<\/p>\n<hr \/>\n<h2 style=\"margin-bottom: 10px;\">Aerodynamics<\/h2>\n<p><strong>EPTT2024-0003<\/strong> Using convolutional neural networks to predict airfoil dynamic stall response<br \/>\n<strong>EPTT2024-0008<\/strong> Analysis of vorticity transport in separated flows over wind turbine airfoils using Detached-Eddy Simulations<br \/>\n<strong>EPTT2024-0023<\/strong> Some experimental results of the impact caused by a rectangular bump on boundary layer transition.<br \/>\n<strong>EPTT2024-0040<\/strong> A Numerical Simulation with OpenFOAM of a NACA0012 at High Reynolds number and critical angle of attack<br \/>\n<strong>EPTT2024-0055<\/strong> Analysis of dynamic stall for a simplified single blade vertical axis wind turbine configuration<\/p>\n<hr \/>\n<h2 style=\"margin-bottom: 10px;\">Hydrodynamic Instability<\/h2>\n<p><strong>EPTT2024-0030<\/strong> Development and validation of a linear stability analysis tool for compressible shear flows<br \/>\n<strong>EPTT2024-0045<\/strong> LINEAR STABILITY ANALYSES OF G\u00d6RTLER VORTICES IN NON-NEWTONIAN BOUNDARY LAYER FLOWS<br \/>\n<strong>EPTT2024-0056<\/strong> Boundary integral simulations based on the vortex sheet formalism applied to track droplet interfaces in Hele-Shaw cells<\/p>\n<hr \/>\n<h2 style=\"margin-bottom: 10px;\">Rheology and Non-Newtonian Fluid Mechanics<\/h2>\n<p><strong>EPTT2024-0017<\/strong> STUDY OF NON-NEWTONIAN FLUID FLOW STABILITY MODELED BY LPTT<\/p>\n<hr \/>\n<h2 style=\"margin-bottom: 10px;\">Theoretical and Analytical Modeling<\/h2>\n<p><strong>EPTT2024-0051<\/strong> Prediction of Transition to Turbulence in Airfoils using Artificial Neural Networks<\/p>\n<hr \/>\n<h2 style=\"margin-bottom: 10px;\">Turbulence<\/h2>\n<p><strong>EPTT2024-0020<\/strong> IMPLICIT LARGE EDDY SIMULATION: MODELING ANISOTROPIC TURBULENCE USING THE LATTICE BOLTZMANN METHOD<br \/>\n<strong>EPTT2024-0033<\/strong> Numerical Study of a Toroidal Propeller<br \/>\n<strong>EPTT2024-0044<\/strong> Investigation of Spanwise Periodic Transitional Airfoil Flows Using the Lattice-Boltzmann Method<br \/>\n<strong>EPTT2024-0050<\/strong> Turbulent Channel flow with Coriolis force using Large-Eddy Simulation<\/p>\n<hr \/>\n<h2 style=\"margin-bottom: 10px;\">Computational Fluid Dynamics<\/h2>\n<p><strong>EPTT2024-0009<\/strong> Methodology for defining optimal geometry of the ejector tee for purge<br \/>\n<strong>EPTT2024-0036<\/strong> EVALUATION OF THE USE OF A FAST MULTIPOLE METHOD IN LAGRANGIAN SIMULATIONS<br \/>\n<strong>EPTT2024-0043<\/strong> Aircraft thermal management: CFD analysis of the wing as a surface heat exchanger<\/p>\n<hr \/>\n<h2 style=\"margin-bottom: 10px;\">Atmospheric Boundary Layer<\/h2>\n<p><strong>EPTT2024-0048<\/strong> Simulation of the Unstable Atmospheric Boundary Layer of Amazon Rainforest Using Large-Eddy Simulation<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u00ba DIA: Segunda-feira 23\/09 08:30 \u2013 9:30 Registro e recebimento dos kits 09:00 \u2013 9:30 Interven\u00e7\u00e3o art\u00edstica (Comit\u00ea de A\u00e7\u00f5es Culturais &#8211; FESJ\/UNESP) 9:30 \u2013 10:30 Cerim\u00f4nia de abertura 10:30 \u2013 10:45 Interven\u00e7\u00e3o art\u00edstica (Comit\u00ea de A\u00e7\u00f5es Culturais &#8211; FESJ\/UNESP) 10:45 \u2013 12:00 Palestra: Prof. Jorge Peixinho (ENSAM \u2013 Paris) Transition to turbulence in pipe [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2085","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/pages\/2085","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/comments?post=2085"}],"version-history":[{"count":43,"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/pages\/2085\/revisions"}],"predecessor-version":[{"id":2364,"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/pages\/2085\/revisions\/2364"}],"wp:attachment":[{"href":"https:\/\/eventos.abcm.org.br\/eptt2024\/wp-json\/wp\/v2\/media?parent=2085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}