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

movaffagh · September 20, 2020, 06:36

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

AlexanderZ · October 5, 2020, 03:27

look for THREAD_SUB_THREAD macro in Ansys Fluent Customization manual

movaffagh · October 5, 2020, 03:36

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

AlexanderZ · October 5, 2020, 03:46

yes
take a look at Custom Drag Law example

movaffagh · October 5, 2020, 03:59

Quote:

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

AlexanderZ · October 6, 2020, 03:34

Ansys Fluent Customization manual

lampfall90@icloud.com · October 13, 2020, 11:46

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

September 20, 2020, 06:36	i need to use density and volume fraction of each phase in Eulerian multiphase method	#1
movaffagh 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
AlexanderZ 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, 03:46		#4
AlexanderZ 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 6, 2020, 03:34		#6
AlexanderZ 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

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