sub channel analysis

hosam1180 · May 7, 2018, 17:14

Hi ,
I'm working in nuclear reactor fluid sub channel heat transfer from fuel rods walls( heat source ,with constant heat flux) to coolant (fluid domin) sub channel with mixing vane (Solid domin), So I found some difficulties as follows:
1. make good setup to deal with solid domin inside fluid domin
to make the analysis of heat transfer and flow behavior.
2. define Nusselt number.

evcelica · May 7, 2018, 17:49

If you are using constant Heat flux at the interface, you do not need to model the solid. Just a void in the fluid domain, where you would use a heat flux boundary condition.

Check the FAQ's for HTC and Nusselt Info:
https://www.cfd-online.com/Wiki/Ansy...ficient_in_CFX

hosam1180 · May 8, 2018, 02:53

[QUOTE=evcelica;691547]If you are using constant Heat flux at the interface, you do not need to model the solid. Just a void in the fluid domain, where you would use a heat flux boundary condition.

thank u for reply, heat flux BC will apply to the walls of fuel rods interface with fluid sub channel,
also i.wont elaborattion about a void in fluid domin

May 7, 2018, 17:14	sub channel analysis	#1
hosam1180 New Member Hosam Join Date: Mar 2018 Posts: 7 Rep Power: 8	Hi , I'm working in nuclear reactor fluid sub channel heat transfer from fuel rods walls( heat source ,with constant heat flux) to coolant (fluid domin) sub channel with mixing vane (Solid domin), So I found some difficulties as follows: 1. make good setup to deal with solid domin inside fluid domin to make the analysis of heat transfer and flow behavior. 2. define Nusselt number.

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May 7, 2018, 17:49		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	If you are using constant Heat flux at the interface, you do not need to model the solid. Just a void in the fluid domain, where you would use a heat flux boundary condition. Check the FAQ's for HTC and Nusselt Info: https://www.cfd-online.com/Wiki/Ansy...ficient_in_CFX

May 8, 2018, 02:53		#3
hosam1180 New Member Hosam Join Date: Mar 2018 Posts: 7 Rep Power: 8	[QUOTE=evcelica;691547]If you are using constant Heat flux at the interface, you do not need to model the solid. Just a void in the fluid domain, where you would use a heat flux boundary condition. thank u for reply, heat flux BC will apply to the walls of fuel rods interface with fluid sub channel, also i.wont elaborattion about a void in fluid domin