Browsing by Author "Pont Vilchez, Arnau"
Now showing items 1-9 of 9
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Assessment and comparison of a recent kinematic sensitive subgrid length scale in Hybrid RANS-LES
(Springer Nature, 2020)
Conference report
Restricted access - publisher's policyA recent kinematic sensitive subgrid length scale, Δlsq, initially developed for LES applications, is now considered for DES. Even though it is presented as a subgrid length scale, instead of a grey area mitigation (GAM) ... -
Assessment of LES techniques for mitigating the Grey Area in DDES models
(2019)
Conference report
Open AccessThe slow RANS-LES transition is a well-known shortcoming in hybrid turbulence models such as DelayedDetached Eddy Simulation (DDES). The present work assesses the feasibility of 2D sensitive LES models for naturally ... -
Direct numerical simulation of backward-facing step flow at Ret = 395 and expansion ratio 2
(2019-03-25)
Article
Open AccessBackward-facing step (BFS) constitutes a canonical configuration to study wallbounded flows subject to massive expansions produced by abrupt changes in geometry. Recirculation flow regions are common in this type of flow, ... -
DNS of a Backward-Facing Step at high Reynolds number. Towards a better understanding of RANS-LES transition in DES models
(2018)
Conference report
Restricted access - publisher's policyA DNS of an incompressible fluid flow over a Backward Facing Step (BFS ) with an Expansion Ratio (ER ) equal to 2, ER = H/(H - h), has been performed. Where h and H represent the step and the outlet heights, respectively. ... -
Estudi i resolució de les equacions de massa, quantitat de moviment i energia sotmeses a un camp magnètic. Identificació de possibles aplicacions
(Universitat Politècnica de Catalunya, 2014-09)
Master thesis (pre-Bologna period)
Open AccessEl projecte consisteix en l’estudi de la interacció entre la dinàmica de fluids i l’electromagnetisme, enfocada des d’un punt de vista numèric en comptes d’experimental. Per una banda, la dinàmica de fluids és una branca ... -
Improving DES capabilities for predicting Kelvin-Helmholtz instabilities. Comparison with a backward-facing step DNS.
(2020-05-10)
Conference report
Restricted access - publisher's policyThe Detached Eddy Simulation (DES) turbulence model presented by Spalart et al. (Comments on the Feasibility of LES for Wings, and on a Hybrid RANS/LES Approach, [1]) in the late 90s, was specifically designed to simulate ... -
A new grey area mitigation technique for DES : theory and assessment
(Universitat Politècnica de Catalunya, 2020-12-17)
Doctoral thesis
Open AccessThe use of hybrid RANS-LES methods has become widespread during the last decade, as an interesting approach for covering the gap between RANS and LES turbulence models in terms of both computational resources and degree ... -
New Strategies for Mitigating the Gray Area in Delayed-Detached Eddy Simulation Models
(2021-09)
Article
Open AccessThis paper presents a new approach for mitigating the unphysical delay in the Reynolds-averaged Navier–Stokes (RANS) to large-eddy simulation (LES) transition, often referred to as the gray area, which is a common issue ... -
Numerical dynamic analysis of reciprocating compressor mechanism. Parametric studies for optimization purposes
(2017-01)
Article
Open AccessA complete numerical dynamic analysis of reciprocating compressor mechanism is presented, coupling the instantaneous pressure in the compression chamber, the electric motor torque and the hydrodynamic reactions, which arise ...
