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December 2, 2017, 19:39 |
Star CCM+ Help
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#1 |
Member
fa
Join Date: Nov 2013
Posts: 30
Rep Power: 12 |
Hello
I am studying mechanical engineering and I need to do a project with star ccm+ but I never used CFD programs before. I am trying to learn how to use the program for two-phase flow (Gas-Liquid) because my project focuses on the interaction between them. I am trying to solve the Stefan problem with gas and water but I do not know how. the model is 40 mm long with about 1 mm in height (hight does not matter because I want to model it as 1 D) I set up my model as Two Dimensional Implicit Unsteady Eulerian Multiphase VOF laminar flow segregated multiphase temperature gravity for the phase interaction model I chose VOF-VOF VOF boiling Rohsenow Boiling interactive density the material properties are the density of both Gas and Water are 1 kg/m3 the mixture latent heat is 1000 kJ/kg the surface tension is 0.01 N/m T sat is 373.15 T wall is 383.15 specific heat for both is 1000 J/kgK Thermal conductivity of water is 1 W/mK and for Gas is 0.1 W/mK the viscosity of Water 0.01 Pas and for Gas is 1E-5 Pas I chose the secondary phase Gas (H2O) and primary phase Water (H2O) and made the VOF as composite and chose a specified filed for the gas on the right side wall for the initial conditions, the pressure was put as the atm pressure static temp. was put as 373.15 K velocity was put as 0 m/s for the right wall boundary condition, I made the temperature specification in the physics condition as a temperature above saturation temp. of 383.15 K The left wall, top wall, and bottom wall was put as plane symmetry I know that there is something wrong with it. Can you help me?? Also, I want to specify the latent heat, so can you inform me how? I figured out that it can be set as the heat of formation and standard static temp. in the material property but I do not understand. I remember seeing in the user guide that they put the latent heat as the heat of formation only, then what is the standard static temp. !! Thank you in advance Last edited by yamifm0f; December 2, 2017 at 21:13. |
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