Temperature Profile through a fluid solid interface

Studentdrak · January 31, 2012, 03:16

Hi

I have simulated a heat transfer problem with two solid domains on the sides and a air domain in the middle (using two fluid solid interfaces)- for different mesh sizes

As i understand the hybrid value of Temperature gives the temperature at interface.
Conservative temperature plot shows a plot staring at a lesser temperature(as we wud expect)

But I need to plot a temperature profile for a line running through all the domains (continuous). Hybrid value plot is quite different (with large gradient variation)

pl. do help asap

ghorrocks · January 31, 2012, 06:42

You have to understand what hybrid and conservative actually mean before deciding this. Conservative is the value of the control volumes. Hybrid uses the wall value at the wall.

In general in this case I would use conservative as it shows the control volume values, and that is what the solver is using.

Studentdrak · January 31, 2012, 07:03

Thanks Glen

Just thought if i can reproduce the (nice smooth)temperature profile (starting from wall to core region ) as shown in books.

I understand Hybrid are wall values n conservative values are that of control volumes.

but the plot function in CFDpost either chose hybrid or conservative to plot.

ghorrocks · January 31, 2012, 19:49

And a fine mesh is another requirement to get a nice smooth profile.

Studentdrak · January 31, 2012, 23:23

Oh.

Thank u

January 31, 2012, 03:16	Temperature Profile through a fluid solid interface	#1
Studentdrak Member Join Date: Aug 2011 Posts: 53 Rep Power: 15	Hi I have simulated a heat transfer problem with two solid domains on the sides and a air domain in the middle (using two fluid solid interfaces)- for different mesh sizes As i understand the hybrid value of Temperature gives the temperature at interface. Conservative temperature plot shows a plot staring at a lesser temperature(as we wud expect) But I need to plot a temperature profile for a line running through all the domains (continuous). Hybrid value plot is quite different (with large gradient variation) pl. do help asap

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January 31, 2012, 06:42		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	You have to understand what hybrid and conservative actually mean before deciding this. Conservative is the value of the control volumes. Hybrid uses the wall value at the wall. In general in this case I would use conservative as it shows the control volume values, and that is what the solver is using.

January 31, 2012, 07:03		#3
Studentdrak Member Join Date: Aug 2011 Posts: 53 Rep Power: 15	Thanks Glen Just thought if i can reproduce the (nice smooth)temperature profile (starting from wall to core region ) as shown in books. I understand Hybrid are wall values n conservative values are that of control volumes. but the plot function in CFDpost either chose hybrid or conservative to plot.

January 31, 2012, 19:49		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	And a fine mesh is another requirement to get a nice smooth profile.

January 31, 2012, 23:23		#5
Studentdrak Member Join Date: Aug 2011 Posts: 53 Rep Power: 15	Oh. Thank u