نتایج جستجو برای: allmaras model

تعداد نتایج: 2104314  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1389

run-out-table (rot) is located between last finishing stand and down coiler in a hot strip mill. as the hot steel strip passes from rot, water jets impact on it from top and bottom and strip temperature decreases approximately from 800-950 °c to 500-750°c. the temperature history that strip experience while passing through rot affects significantly the metallurgical and mechanical properties, s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1382

‏‎the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...

Journal: :Journal of computational and applied mechanics 2022

This paper presents the evaluation of Stanford University Unstructured (SU2) open-source computational software package for a high Mach number 5 flow. The test case selected is an impinging shock wave turbulent boundary layer interaction (SWTBLI) on flat plate where experimental data Sch¨ulein et al. [27] used validation purposes. Two turbulence models, Spalart–Allmaras (SA) and k-ω Shear Stres...

Journal: :Energies 2021

One-dimensional unsteady Reynolds-averaged Navier–Stokes computations were performed for oscillatory transitional and turbulent pipe flows the results validated against existing experimental data a wide variety of Reynolds Womersley numbers. An version Johnson–King model was implemented with optional near-wall modification to account temporal pressure gradient variations, predictions compared t...

Journal: :Fluids 2022

This study experimentally and numerically investigates the effects of nozzle/needle distance (clearance) supply pressure on single phase compressible gas flow in a micro orifice with needle restriction, which play important roles many engineering applications such as cryogenic cooling MEMS (microelectromechanical systems) device cooling. Nitrogen was used working fluid at pressures ranging from...

Journal: :Energy 2023

The aerodynamic performance of a cylinder Pitot probe for velocity measurements in compressible non-ideal gas flows, such as those encountered Organic Rankine Cycle (ORC) turbines, is investigated by means Computational Fluid Dynamics. Numerical simulations are performed at subsonic and transonic conditions, freestream Reynolds numbers the critical regime. working fluid organic vapour Novec™ 64...

Journal: :Computers & Fluids 2021

The Reynolds-averaged Navier-Stokes (RANS) equations for steady-state assessment of incompressible turbulent flows remain the workhorse practical computational fluid dynamics (CFD) applications. Consequently, improvements in speed or accuracy have potential to affect a diverse range We introduce machine learning framework surrogate modeling eddy viscosities RANS simulations, given initial condi...

2006
Aldo Bonfiglioli Bruno Carpentieri Masha Sosonkina

We present results with a parallel CFD code that computes steady-state solutions of the Reynolds-Favre averaged Navier-Stokes equations for the simulation of the turbulent motion of compressible and incompressible Newtonian fluids. We report on preliminary experiments on 2D and 3D problems, for both internal and external flow configurations. In this communication we present numerical results wi...

Journal: :Computers & Fluids 2021

One of the main limitations in computational aerodynamics lies ability CFD solvers to handle complex geometries while maintaining their accuracy. Among currently available strategies, Zonal Immersed Boundary Conditions (ZIBC) has shown its capability introduce geometrical details for simulations high Reynolds turbulent flows. In this context, work aims extend ZIBC framework, initially adapted r...

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