CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   free stream temperature (http://www.cfd-online.com/Forums/fluent/28058-free-stream-temperature.html)

 qzhu November 30, 2000 02:20

free stream temperature

Please teach me the following question: when I use the tempetature boundary conditions,for example convection wall , free stream temperature is required. Where is the "free stream temperature" ? For example, free stream temperature is a reference temperature in fluid field(indoor)? or,free stream temperature is a reference temperature in fluid field(outdoor)?

 Angus Duncan November 30, 2000 09:03

Re: free stream temperature

The free stream temperature of your problem is the temperature of that fluid which is acting as the sink. For example, in the case of a utility boiler, the free stream temperature can be defined as the mean temp of the water/steam mixture rising in the wall tubes (away from the boundary layer). If no heat were being extracted from the system by this means then the external (environment) temp could be applied e.g. 273K in scotland!

Angus

 Volker Pawlik December 7, 2000 11:37

Re: free stream temperature

Hi,

the free stream temperature is the temp. outside of your domain. It controls the heat transfer by the equation: heat transfer= heat transfer coefficient *(T_wall - T_free)

 qzhu December 8, 2000 04:00

Re: free stream temperature

Thank you for counsel.

My calculation is carrying out well.

 qzhu December 8, 2000 04:01

Re: free stream temperature

Thank you for counsel. My calculation is carrying out well.

 sircorp June 10, 2015 03:55

Quote:
 Originally Posted by Volker Pawlik ;95603 Hi, the free stream temperature is the temp. outside of your domain. It controls the heat transfer by the equation: heat transfer= heat transfer coefficient *(T_wall - T_free)
Thanks Volker Pawlik

 All times are GMT -4. The time now is 04:25.