fluent对搅拌槽问题的模拟.ppt

Company Confidential Copyright 2001 Fluent Inc. All rights reserved. New Initiatives at Fluent Inc. Impeller Motion : Velocity fix option Multiple reference frame Sliding (Moving) mesh Multiple-shaft Impeller motion (1) Impeller Motion (2) Liquid-Solid application Velocity fix option, along with Eulerian-Granular model used. For the operating conditions in the tank the solids settle down. MRF-Multiphase application Chemineer HE-3 impeller at 250 rpm. MRF along with Eulerian multiphase model used. Gas-Liquid Systems MRF along with Eulerian multiphase model used. Sliding mesh-Eulerian Multiphase and VOF * UGM 2001 Modeling Stirred tank problems in Fluent 6 Kumar Dhanasekharan, Srinivasa Mohan, and Ahmad Haidari UGM 2001 Comprehensive testing is under way for examining the functionality offered in Fluent 6 for modeling stirred tank mixing problems. This poster highlights some of the elements of the test Matrix. The testing program examines combination of various Physical models such as: Species transport, turbulence (ke, rng, les), multiphase (DPM, ASMM, VOF and Euler-Euler) against different ways an impeller can be represented in Fluent 6 (Fix option, mrf, sliding mesh) The tests also examine different mesh topology and impeller motion including multiple impellers and shaft orientation. Overview Physical Models Algebraic slip mixture model Eulerian Eulerian multiphase model (gas-liquid and solids-liquid) Results presented HE-3 impeller using the velocity fix option Rushton turbine using MRF Complex impellers (Hybrid Mesh) Multi-shaft arrangement Tet. Mesh Sliding mesh and Euler-Euler multiphase is used. The plots illustrate the contours of volume fraction of the solids. * *