# i need to use density and volume fraction of each phase in Eulerian multiphase method

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 September 20, 2020, 06:36 i need to use density and volume fraction of each phase in Eulerian multiphase method #1 New Member   mohammad Join Date: Dec 2019 Posts: 15 Rep Power: 6 i want to simulate boiling with Eulerian CHF or RPI boiling models. now i want to compile a udf for my simulation and i need the volume fraction,density and velocity of each phase. primary phase is wwater and secondary phase is vapor. i know there are C_vof(c,t) and C_R(c,t) in udf manual but i think these macros give me vof and density in single phase or give me the mixture property. i should use vof and density from each phase. how can i do it? thank you Mohammad

 October 5, 2020, 03:27 #2 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34 look for THREAD_SUB_THREAD macro in Ansys Fluent Customization manual movaffagh likes this. __________________ best regards ****************************** press LIKE if this message was helpful

October 5, 2020, 03:36
#3
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Quote:
 Originally Posted by AlexanderZ look for THREAD_SUB_THREAD macro in Ansys Fluent Customization manual
Hi, thank you AlexanderZ
is this macro help to me for seperate the value of each phase?

regards,
Mo.Movffagh

 October 5, 2020, 03:46 #4 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34 yes take a look at Custom Drag Law example __________________ best regards ****************************** press LIKE if this message was helpful

October 5, 2020, 03:59
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 Originally Posted by AlexanderZ yes take a look at Custom Drag Law example
can you give me a link for drag example?
my simulation is two phase and its boiling. how drag examples can help me?

regards,

Mo.Mvaffagh

 October 6, 2020, 03:34 #6 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34 Ansys Fluent Customization manual __________________ best regards ****************************** press LIKE if this message was helpful

October 13, 2020, 11:46
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Lamp
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Quote:
 Originally Posted by movaffagh i want to simulate boiling with Eulerian CHF or RPI boiling models. now i want to compile a udf for my simulation and i need the volume fraction,density and velocity of each phase. primary phase is wwater and secondary phase is vapor. i know there are C_vof(c,t) and C_R(c,t) in udf manual but i think these macros give me vof and density in single phase or give me the mixture property. i should use vof and density from each phase. how can i do it? thank you Mohammad
Hello sir, please could you help me with the udf code for your problem if you get any resolution for the problem because I am dealing with gas liquid two phase in axial flow pump ? Thanks

 Tags boiling flow, multi phase, property, udf code