Eulerian method-Critical Heat Flux(CHF) Problem!
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Hello everyone,
I want to estimate the critical heat flux of a two-phase flow in a flat mini channel (2mm x 2mm x 200mm). Mesh number is 234000. More details about the model setting are given below. Model Settings: Steady State Eulerian Multiphase Model- Boiling Model - Critical Heat Flux (Primary Phase = Liquid Water; Secondary Phase = Water Vapor) Realizable k-epsilon model with Enhanced Wall Function Phase Interactions:Drag -ishii Scheme: Phase Coupled Simple Momentum-Volume Fraction,Turbulent Kinetic Energy,Dissipation Rate and Energy:QUICK Velocity inlet 0.2 m/s apprx. G=200 kg/m2s Heat Flux: I applied between 40-100 kW/m2 When I make a solution like this, I can not see the phase change. In addition, vf phase 2 and energy p2 values in the residual graph are always zero.http://hizliresim.com/nRbPG1 I have tried dividing the phase intervals like the VOF model by adapt. When I do this, the system gives the error of divergence. what should I do? |
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