where is the superman about the IPSAfull
dear all:
i want to simulate the twoflow fluid with IPSAfull model .but (1)how can i get the value of P2,and how can i modify the P2 value .for example make p2=p2+constant (2)in the IPSAfull model ,how does it trace the interface of twoflow.could you tell me where the associated subroutine is 
no one?？？/？/???/

P2 in IPSA
If you enter STORE(P2) in the Q1 input file , then PHOENICS will compute the pressure acting on the 2ndphase momentum momentum to be P1 + P2, where P1 is the pressure acting on phase 1. Therefore, P2 is the EXTRA pressure experienced by phase 2.
It is the responsibility of the user to specify the formula for P2 in Group 19 Section of GROUND, or alternatively by use of the INFORM facility within the Q1 input file. A GROUNDcoding example of setting a P2formula is given in Group 19 Section 4 of the file GREX3.FOR, as follows: C IF(STORE(P2)) THEN IF(STORE(VPOR)) THEN C.... Extra secondphase pressure proportional to volume fraction C divided by porosity. CALL FN15(P2,R2,VPOR,0.0,PHS2PA) ELSE IF(PHS2P) THEN C.... Extra secondphase pressure proportional to: C a*(r2r2crit)**b if r2 gt r2crit. L0R2=L0F(R2) L0P2=L0F(P2) RLX=ABS(DTFALS(P2)) DO 1941 I=1,NXNY IF(F(L0R2+I).GT.PHS2PA) THEN GP2=PHS2PB*(F(L0R2+I)PHS2PA)**PHS2PC ELSE GP2=0.0 ENDIF F(L0P2+I)=RLX*GP2+(1.0RLX)*F(L0P2+I) 1941 CONTINUE ELSE C.... Extra secondphase pressure proportional to volume fraction CALL FN2(P2,R2,0.0,PHS2PA) ENDIF ENDIF ENDIF ENDIF 
Thanks for phoenics_cfd's immediately reply
now if i want to specify my EXTRA pressure experienced by phase 2,is it correct to specify the formula for P2 in Group 19 Section 4? is it neceesary for me to change the pressure correction methods? and how could i change the P2 by use of the INFORM ? THANK YOU AGAIN 
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