*=======================================================================
      SUBROUTINE USER(K)
*-----------------------------------------------------------------------
$INCLUDE:'SIMPLE.INC'
      DIMENSION TH(22),THU(22),THDIF(22),THCV(22),THCVS(22)
      EQUIVALENCE(X,TH),(XU,THU),(XDIF,THDIF),(XCV,THCV),
     + (XCVS,THCVS),(XL,THL)
*-----------------------------------------------------------------------
      COMMON/CNTL/LSTOP
      COMMON/SORC/SMAX,SSUM
      COMMON/COEF/FLOW,DIFF,ACOF
*-----------------------------------------------------------------------
*--------------------------   PROBLEM  11   ----------------------------
*-----------------------------------------------------------------------
	DIMENSION T(22,22)
	EQUIVALENCE (F(1,1,4),T(1,1))
*-----------------------------------------------------------------------
	GOTO (1,2,3,4,5,6),K
*-----------------------------------------------------------------------
*	ENTRY GRID
1	XL=1.
	YL=2.
	L1=7
	M1=12
	MODE=1
	CALL SUPPLY(1)
	RETURN
*-----------------------------------------------------------------------
*	ENTRY START
2	CONTINUE
	DO 14 I=1,3
	LSOLVE(I)=.TRUE.
14	LPRINT(I)=.TRUE.
	TITLE(1)=' VEL U '
	TITLE(2)=' VEL V '
	LPRINT(3)=.FALSE.
	TITLE(4)=' TEMP  '
	TITLE(11)='PRESSURE'
	LPRINT(4)=.TRUE.
	RELAX(1)=0.5
	RELAX(2)=0.5
	RELAX(11)=1.
	LPRINT(11)=.TRUE.
	LAST=40
	DEPTH=0.2
	FLOW=4.
	UIN=100.
	TIN=500.
	TAIR=100.
	HTC=2.
	PR=5.
	CP=1.2
	AMU=1.
	AMUP=AMU/PR
	FDZ=FLOW/DEPTH
	DO 100 J=1,M1
	DO 100 I=1,L1
	U(I,J)=0.
	V(I,J)=0.
	T(I,J)=TAIR
100	CONTINUE
	RETURN
*-----------------------------------------------------------------------
*	ENTRY DENSE
3	CONTINUE
	RETURN
*-----------------------------------------------------------------------
*	ENTRY BOUND
4	CONTINUE
	IF(ITER.LT.35)RETURN
	DO 300 NF=1,3
300	LSOLVE(NF)=.FALSE.
	LSOLVE(4)=.TRUE.
	RETURN
*-----------------------------------------------------------------------
*	ENTRY OUTPUT
5	CONTINUE
	IF(ITER.NE.0) GO TO 400
	WRITE(*,401)
401	FORMAT('   ITER',6X,'SMAX',8X,'SSUM',7X,'V(4,7)',6X,
     + 'U(6,4)',6X,'T(5,9)')
400	WRITE(*,403) ITER,SMAX,SSUM,V(4,7),U(6,4),T(5,9)
403	FORMAT(I6,1P5E12.3)
	IF(ITER.NE.LAST)RETURN
	CALL SUPPLY(2)
	RETURN
*-----------------------------------------------------------------------
*	ENTRY GAMSOR
6	CONTINUE
	DO 500 J=1,M1
	DO 500 I=1,L1
	GAM(I,J)=AMU
	IF(NF.EQ.4)GAM(I,J)=AMUP
	IF(NF.NE.4) GO TO 500
	GAM(1,J)=0.
	GAM(I,1)=0.
	GAM(I,M1)=0.
	GAM(L1,J)=0.
500	CONTINUE
	IF(NF.NE.1) GOTO 510
	SOR=0.5*FDZ/(XCVS(4)*YCV(4))
	CON(4,4)=SOR*UIN
	AP(4,4)=-SOR
	SOR=0.5*FDZ/(XCVS(5)*YCV(4))
	CON(5,4)=SOR*UIN
	AP(5,4)=-SOR
	RETURN
510	CONTINUE
	IF(NF.NE.2)GOTO 520
	SOR=0.5*FDZ/(XCV(4)*YCVS(4))
	AP(4,4)=-SOR
	SOR=.5*FDZ/(XCV(4)*YCVS(5))
	AP(4,5)=-SOR
	RETURN
520	CONTINUE
	IF(NF.NE.3)GOTO 530
	CON(4,4)=FDZ/(XCV(4)*YCV(4))
	CON(5,9)=-FDZ/(XCV(5)*YCV(9))
	RETURN
530	CONTINUE
	IF(NF.NE.4)GOTO 540
	SOR=HTC/(CP*DEPTH)
	DO 531 J=2,M2
	DO 531 I=2,L2
	CON(I,J)=SOR*TAIR
531	AP(I,J)=-SOR
	SOR=FDZ/(XCV(4)*YCV(4))
	CON(4,4)=CON(4,4)+SOR*TIN
	AP(4,4)=AP(4,4)-SOR
540	CONTINUE
	RETURN
	END