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July 14, 2009, 23:59 |
closed system
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#1 |
New Member
muhammad irham mahfud
Join Date: May 2009
Posts: 14
Rep Power: 17 |
hi,
i want to ask again about my case. my case is about pressure rise(unsteady) in multiphase closed system (vessel). my questions are: 1. because my case is closed system i just apply some heat flux in the domain.but in the specifying well-posed boundary conditions section said that my boundary condition is under specific problem because its just wall for heat flux. 2. thermal energy used for low speed but total energy may experience robustness problems due to the pressure. which is better for my case? 3. which is better to used eulerian or lagrangian multiphase model? thanks, |
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July 15, 2009, 05:39 |
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#3 |
New Member
muhammad irham mahfud
Join Date: May 2009
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Rep Power: 17 |
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July 15, 2009, 05:49 |
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#4 |
Senior Member
George
Join Date: Mar 2009
Location: Birmingham, UK
Posts: 257
Rep Power: 18 |
1) better description means a full problem description and ccl if you want specific help.
2) Total energy. have a read in the manual but I attach a small extract which is relevant "For materials which have variable specific heats (e.g., set as a CEL expression or using an RGP table or Redlich Kwong equation of state) the solver includes the contribution in the enthalpy tables. This is inconsistent, because the variable is actually internal energy. For this reason, the thermal energy equation should not be used in this situation, particularly for subcooled liquids." 3)
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