|
[Sponsors] |
November 24, 2008, 01:26 |
User Subroutine ----- sorent
|
#1 |
Guest
Posts: n/a
|
In the head of soren subroutine, it says "This subroutine enables the user to specify a source term (per unit volume) for enthalpy in linearized form:
Source = S1P-S2P*T, (W/m3)". Why the unit is "w/m3"? Shouldn't enthalpy be J/kg?What does "per unit volume" mean? Should I define enthalpy (H) as: H = f(T)/ VOLP ? VOLP-----volume of the cell (m3). |
|
November 24, 2008, 12:37 |
Re: User Subroutine ----- sorent
|
#2 |
Guest
Posts: n/a
|
w/m3 is rate energy is added per unit volume (in this case a unit volume is a cubic meter). A watt is just one joule per second... using joules would have no meaning in a steady state simulation, because time in infinite.
|
|
November 24, 2008, 20:45 |
Re: User Subroutine ----- sorent
|
#3 |
Guest
Posts: n/a
|
Thank you, ad. I very appreciate your answer.
In the letter,it said"using joules would have no meaning in a steady state simulation,because time in infinite." Do you mean that the sorent subroutine must be sued in a transient simulation? "in this case a unit volume is a cubic meter", and "the case" mesns the example equation-----"Source = S1P-S2P*T" or all the expressions used in this subroutine? If answer is the latter, then should I difine the source as: Source = H/VOLP = (S1P-S2P*T)/VOLP ? H ----- enthalpy, VOLP ----- volume of the cell in my mold. Regards. conglin |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
How can I call EM in subroutine-----sorent.f | conglin | Siemens | 1 | November 28, 2008 11:12 |
User Subroutine | A. Said | CFX | 9 | March 7, 2008 15:49 |
User Subroutine | Garryx | Siemens | 1 | June 25, 2005 00:13 |
subroutine sorent.f | Peter | Siemens | 5 | April 15, 2004 01:25 |
User subroutine | Don Baker | Siemens | 1 | September 29, 2002 12:27 |