SP in USRSRC-CFX4

RK

Hi,

In the Source representation: S= SU+(PHI*SP)

When putting variables into SP, does one need to differentiate the term with respect to the variable?

For example:

IF the source(=TERM): TERM=(CNST1*H/CNST2+H), CNST1 & CNST2=constants, H=enthalpy

If this is a negative source and needs to be placed in SP,

is it simply: SP(INODE,IPHASE)=SP(INODE,IPHASE)-(CNST1/CNST2+H)

or

does one need to dTERM/dh, and then put the solution to this into SP.

If it is the latter, could you also explain why is this so? And if it applies to SP, why does it not apply to SU?

Hope someone can shed some light on this issue...

Many thanks,

Robin