[PDF] Top 20 An a posteriori-implicit turbulent model with automatic dissipation adjustment for Large Eddy Simulation of compressible flows

... present an a posteriori high-order nite volume scheme for the computation of compressible turbulent ...ows. An automatic dissipation ... Voir le document complet

... Large eddy simulation. The last part of this thesis is devoted to large eddy ...WALE model - have been implemented into ...models for flows characterized by ... Voir le document complet

... features for this study are as follows. The code solves the compressible Navier-Stokes equations which allows to take into ac- count ...Flame model for turbulent combustion [12, 28] ... Voir le document complet

... Activation With Runback We now proceed to show that the method is also able to treat unsteady situations of high interest for icing applications, which can’t be treated with Messinger’s ... Voir le document complet

... is a powerful tool to diagnose different ef- fects of TRI and to test usual approximations like the ...context of RANS, to evaluate the effect of the deviation from the mean of the solu- ... Voir le document complet

... begins with an ignition of a quiescent flammable mixture inside a confined or semiconfined ...interaction with obstacles (process equipment, structures, piping, ...), generating ... Voir le document complet

... 4.7.3.3 Terme de sous-maille : ∇. [(ν + ν t )∇u] Le modèle utilisé, pour modéliser la dissipation des petites échelle,s est de type Smago- rinsky. Le modèle sous-maille calcule le comportement des grandes ... Voir le document complet

... prediction for ηi and β as given by Eqs. (12) and (13) into Eq. (11) yields an estimation of the sub-grid scale wrinkling factor Ξ or identically ST /SL as a function of filter size r ... Voir le document complet

... refined with the LES ...formation of the flame kernel after the laser shot and ends when the kernel reaches recirculation ...23 a and ...success of ignition depends on the competition between ... Voir le document complet

... emergence of new simulation tools and especially Computational Fluid Dynamics ...is a key for a good ...Detached Eddy Simulation (DES), Large Eddy ... Voir le document complet

... case of gas turbine configurations or the experimental facility in case of research ...run a CFD code able to deal with complex separated flows and periodic inversion of the flow ... Voir le document complet

... Number of time-iterations for each test case the second one (top right) and the third one (bottom) involve several distinct ...LP implicit and is compared with its explicit version (which ... Voir le document complet

... CONCLUSION A possible drawback of our approach is the implementation of class definition in Protégé and model selection in ...powers of ontology with the control flow execution, ... Voir le document complet

... terms: a mechanical relaxation effect and a thermodynamical effect that accounts for mass ...basic model and its ...on a two-step strategy involving a convective step (by the ... Voir le document complet

... parts of the τ 13 stress obtained only with the fine mesh configurations, showing that mid-range and high aspect ratios help better resolve the turbulent structures in the surface layer and depend ... Voir le document complet

... stochastic model is tested in the case of homogeneous isotropic ...Introduction Turbulent flows with suspended particles of non spheri- cal shape are a common occurrence ... Voir le document complet

... derive a primitive system using classical mechanics arguments: we first use a Least Action Principle to derive the conservative part of the ...designing an entropy ...system with source ... Voir le document complet

... adapted for comparison with the experiment, despite the rather large frequency step: nearly 300 ...Hz. A remarkable agreement is observed between the experimental and numerical results, ... Voir le document complet

... apply a recently developed framework for the discovery of precursors to extreme events [ 3 ...to a constrained optimization problem (note that a formally similar approach was presented ... Voir le document complet

... approximation of the Euler compressible system. It pursues a two-fold objective: being able to accurately follow slow material waves as well as strong shock waves in the context of low Mach ... Voir le document complet