RANS Simulations of NASA-CRM by the Finite-volume Method with the SST Turbulence Model

2018 ◽  
Vol 17 (0) ◽  
pp. 219-225 ◽  
Author(s):  
Kazuaki NAKAMURA ◽  
Koji MIYAJI
Keyword(s):  
Finite Volume Method ◽  
Finite Volume ◽  
Turbulence Model ◽  
Sst Turbulence Model ◽  
Rans Simulations ◽  
Volume Method

Calculation of Flow in Mixing Vessels With Various Turbulence Models

Volume 4 ◽  
2004 ◽  
Author(s):  
Branislav Basara ◽  
Ales Alajbegovic ◽  
Decan Beader
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Turbulence Model ◽  
Unstructured Grids ◽  
Turbulence Models ◽  
Cfd Applications ◽  
Volume Method ◽  
Rushton Impeller

The paper presents calculations of flow in a mixing vessel stirred by a six-blade Rushton impeller. Mathematical model used in computations is based on the ensemble averaged conservation equations. An efficient finite-volume method based on unstructured grids with rotating sliding parts composed of arbitrary polyhedral elements is used together with various turbulence models. Besides the standard k-ε model which served as a reference, k-ε-v2 model (Durbin, 1995) and the recently proposed hybrid EVM/RSM turbulence model (Basara & Jakirlic, 2003) were used in the calculations. The main aim of the paper is to investigate if more advanced turbulence models are needed for this type of CFD applications. The results are compared with the available experimental data.

Numerical Calculation on Vortex-Induced Vibration of the Circular Cylinder Using Low Reynolds Model in Hybrid Method

2009 ◽  
Author(s):  
Xingwei Zhang ◽  
Chaoying Zhou
Keyword(s):  
Numerical Calculation ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Turbulence Model ◽  
Stokes Equations ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Vortex Induced Vibration ◽  
Mesh Method ◽  
Volume Method

Fundamental research on interaction between flow and structure is presented for computation the fluid dynamics of different two-dimensional oscillating models. The Navier-Stokes equations are solved using finite volume method. A multigrid mesh method which was applied to the situation of flow past the stagnating or vibrating cylinder is developed to simulate this type of flow. The interactive results between flow and structure rigid cylinders have been present. The computation fluid dynamic codes mainly with low Reynolds RANS solver are used to solve the impressible viscous Navier-Stokes equations. Finite volume method which is coupled with conformal hybrid mesh method is developed to simulate this type of flow. Numerical investigation focused on the response and the fluid forces on the cylinders and also observed the different shedding model in the wake. The numerical results are compared in detail with recent experimental and computational work. Present numerical comparison also showed that solution using different turbulence model will make the result have a little discrepancy and each turbulence model has respective characteristics in numerical solution on the vortex-induced vibration of the cylinder. In addition, the formation of the 2P vortex shedding model through the lock-in region and the beginning of the shedding model transformation in numerical calculation from 2S model to 2P model has been analyzed.

Fluid Pattern and Optimum Design of Sump Based on CFD

2012 ◽  
Author(s):  
Li Cheng ◽  
Chao Liu
Keyword(s):  
Finite Volume Method ◽  
Optimum Design ◽  
Finite Volume ◽  
Turbulence Model ◽  
Safe Operation ◽  
Common Criteria ◽  
Design Values ◽  
Simplec Algorithm ◽  
Flow Through ◽  
Volume Method

The open sump is a typical inlet passage for small to middle-sized pumping station. It is important for the efficiency and safe operation of pumps that the open sump has an optimum design. The flow through the sump and into the pump is calculated using CFD. The incompressible N-S equations are solved by the finite volume method. The RNG k-ε turbulence model and the SIMPLEC algorithm for pressure-velocity coupling are used. Many different designs for the open sump are considered, the results of which are compared based on common criteria to evaluate the sump performance. Design values for the width, the depth of submergence and the bellmouth shape are derived.

Kinematic simulation of dynamo action by a hybrid boundary-element/finite-volume method

2008 ◽  
Vol 44 (3) ◽  
pp. 237-252 ◽  
Author(s):  
A. Giesecke ◽  
F. Stefani ◽  
G. Gerbeth
Keyword(s):  
Boundary Element ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Dynamo Action ◽  
Kinematic Simulation ◽  
Volume Method
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