CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Temperature Rise

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   January 1, 2009, 07:59
Default Temperature Rise
Ashok kumar
Posts: n/a
I've a case where I need to see the rise in temperature of solid inside a oil pipe line for different time step. Initial temperature of solid is 360 K whereas for oil is 423K.

My problem is I can see the drastic rise in temperature of the solid only for the I time step and in the later time steps the temperature doesnt change much.

According to thermal equilibrium, at one stage the temperature of the solid should match with the oil. Even If I go to very larger time step (20 mins) the temperature of the solid is not changing beyond a limit. According to experimental data, the solid reaches the oil temperature in 3 mins.

requesting support ...

  Reply With Quote

Old   January 2, 2009, 20:26
Default Re: Temperature Rise
Posts: n/a


I would suggest you to do some checks

1)The Density, Thermal conductivity and cp value for the solid is correct

2)Are the pipe walls adiabatic if so might change the results.In case your solid is in direct contact with pipe wall.In real life scenario the pipe which is having a hot flow will experience a convective heat transfer on outer surface as well as inner surface (If not insulated).

3)And may be if all the things are well incorported in the case according to the physics, then it would be the time step which can be play a significant role.

Hope so i have tried to guess your problem.


  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
temperature rise due to viscous dissipation Marek Main CFD Forum 6 December 30, 2004 16:24
rise in total pressure Prabodh Siemens 0 September 29, 2004 05:15
Air temperature rise due to the compression of fan Boris FLUENT 0 January 27, 2003 21:11
Temperature rise at a boundry condition Rodrigo FLUENT 5 August 3, 2001 10:04
temperature rise in combustion simulation yulia FLUENT 6 April 4, 2001 11:29

All times are GMT -4. The time now is 18:24.