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Newtonian.f90
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Newtonian.f90
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! Subrutine for updating the film thicknes, the viscocity and the density based on the given pressure
! Almost the same as in the EHL calculations but does not change the temperature, nor call the stop to large out
SUBROUTINE Newtonian(SS, NYs, T40, Tcvot, NN, t)
implicit none
COMMON /Current/ RO,EPSx,EPSy,EDAx,EDAy,xi,W,Wside ! Current timestep
COMMON /CurrentP/ P
COMMON /CurrentH/ H
COMMON /Contact_mat/ contact
COMMON /Visc/ ENDA,A1,A2,A3,Z,HM0r, PH, Pref, alpha, EDA0 ! Lubrication parameters
COMMON /Rho/ RA1,RA2 ! Density parameters
COMMON /Grid/ NX,NY,X0,XE,DX ! Grid parameters
COMMON /Holmes/ kH, xH, gH, lH ! Viscosity and denisty param acc Holems et al
COMMON /Ref/ PAIAK, meth, tmeth, Geom, Lub_param, asp_shape, contact_alg ! Coise of equations based on referense
COMMON /CurrentT/ Temp
COMMON /RLarsson/ EpsT0,RL_Ta,S0, RL_G0, Dz, Cz,RL_T0, RL_c ! Parameters for ref 10, R. Larssons formulation
COMMON /outp/ W0,EE,RX,Um, Ua, B, U2_over_Us, BY, Ry
COMMON /Yasutomi/ Ta,Tg0,YA1,YA2,YB1,YB2,YC1,YC2,Yedag,Yalfag ! Lubrication parameters acc Yasutomi
COMMON /Y_Liu/ L_n, L_G, L_h_limit, L_iter, L_stab ! Lubrication and convergence parameters acc Y.Liu 2007
COMMON /Method/ term1,term2,term3,term4 ! Controling the numerical method
COMMON /shear_lim/ shear_max, shear_min, temp_max
! Input
real P(1:601,1:601),H(1:601,1:601), Temp(1:601,1:601)
integer contact(1:601,1:601)
real RX, ENDA, Um, Ua
integer NX, NN, SS, Lub_param, t
Real Z, EDA0, Pref, alpha
real B, PH
real kH, xH, gH, lH
real EpsT0,RL_Ta,S0, RL_G0, Dz, Cz,RL_T0, RL_c, EpsT
real T40, Tcvot, L_stab
real Ta,Tg0,YA1,YA2,YB1,YB2,YC1,YC2,Yedag,Yalfag
integer term1,term2,term3,term4
real shear_max, shear_min, temp_max
! Calculations
integer I,J, JJ, temp_iter
real EDA_1, EDA_2, EDA_3
real EDA_cont, EDA22, EDA33, EDA1
real Emat, pg, Tg, YF
real temp_0, ub, u_slip, h_real
real tau_x_f, tau_y_f, tau_x_c, tau_y_c
real dPdx, dPdy
integer J0, J1, J2, I0, I1, I2
! Other
real W(1:601,1:601),Wside(1:601,1:601) ! Current timestep
Integer NY, tmeth, NYs, Geom, meth, contact_alg
Integer asp_shape
Real X0, XE, PAIAK
Real W0, RA1, RA2, BY, Ry, EE, U2_over_Us
Real DX
real HM0r
real A1, A2, A3
real L_n, L_G, L_h_limit, L_iter
! Output
real RO(1:601,1:601),EPSx(1:601,1:601),EPSy(1:601,1:601),EDAx(1:601,1:601),EDAy(1:601,1:601),xi(1:601,1:601)
SAVE /Current/ ! Current timestep
!Minimum viscosity if contact
If( lub_param .EQ. 1)THEN
EDA_cont=EXP(alpha*Pref/Z*(-1+(1+3.0*PH/Pref)**Z))
ELSE If( lub_param .EQ. 11)THEN
EDA_cont=EXP(alpha*(3.0*PH)**Z)
else If( lub_param .EQ. 2)THEN
! Roelands equation acc Gohar
EDA_1=5.1*PH*3.0/10**(9)
EDA_2=(1.0+EDA_1)**Z
EDA_3=(log(EDA0)+9.67)
EDA_cont=EXP(EDA_3*(EDA_2-1.0))
else If( lub_param .EQ. 3)THEN
EDA_cont=EXP(LOG(EDA0/kH)*((1+xH*PH*3.0)**Z-1))
else If( lub_param .EQ. 4 .OR. lub_param .EQ. 60)THEN
EDA_cont=EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*3.0*PH)**Z)) !Roland Larsson pressure visc relation
elseif( Lub_param .eq.5) then
EDA_cont=Yedag
else If( lub_param .EQ. 6)THEN
EDA_cont=EXP(log(EDA0+9.67)*((1+3.0*PH/Pref)**Z-1))
!else
!EDA_cont=Yedag
ENDIF
! Calculate the viscocity, the density and the dimentionles parameter EPS -----------------------------------------------------------------------------------------
IF( Lub_param .EQ. 1) THEN
! Newtonian acc X.Tans paper ref 30 31, Cylinder
DO J=1,NN,SS
DO I=1,NX,SS
! Roelands equation acc X.Tan and Venner
EDAx(I,J)=EXP(alpha*Pref/Z*(-1+(1+P(I,J)*PH/Pref)**Z))
if (EDAx(I,J) .GT. 1E32) EDAx(I,J)=1E32 ! To limit the viscosity to som reasonable? values. Intended to increase convergense.
EDAy(I,J)=EDAx(I,J)
! D-H Formulation acc X.Tan
!RO(I,J)=(5.9E8+1.34*P(I,J)*PH)/(5.9E8+P(I,J)*PH)
RO(I,J)=1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J))
xi(I,J)=0.0 ! Should be able to remove xi becouse we're never changing it
!IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
!ENDIF
!
!IF ( RO(I,J) .LT. 1.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
!ENDIF
IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
ENDDO
ENDDO
ELSE IF( Lub_param .EQ. 11) THEN
! Barus equation with extra Z
DO J=1,NN,SS
DO I=1,NX,SS
! Roelands equation acc X.Tan and Venner
EDAx(I,J)=EXP(alpha*(P(I,J)*PH)**Z)
if (EDAx(I,J) .GT. 1E32) EDAx(I,J)=1E32 ! To limit the viscosity to som reasonable? values. Intended to increase convergense.
EDAy(I,J)=EDAx(I,J)
! D-H Formulation acc X.Tan
!RO(I,J)=(5.9E8+1.34*P(I,J)*PH)/(5.9E8+P(I,J)*PH)
RO(I,J)=1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J))
xi(I,J)=0.0
!
!IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
!ENDIF
!
!IF ( RO(I,J) .LT. 1.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
!ENDIF
!
IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
ENDDO
ENDDO
ELSEIF( Lub_param .EQ. 2) THEN
! Newtonian acc Gohars book Elastohydrodynamics
DO J=1,NN,SS
DO I=1,NX,SS
! Roelands equation acc Gohar
EDA_1=5.1*PH*P(I,J)/10**(9)
EDA_2=(1.0+EDA_1)**Z
EDA_3=(log(EDA0)+9.67)
EDAx(I,J)=EXP(EDA_3*(EDA_2-1.0))
if (EDAx(I,J) .GT. 1E32) EDAx(I,J)=1E32 ! To limit the viscosity to som reasonable? values. Intended to increase convergense.
EDAy(I,J)=EDAx(I,J)
! D-H Formulation acc X.Tan
RO(I,J)=1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J))
xi(I,J)=0.0
!
!IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
!ENDIF
!
!IF ( RO(I,J) .LT. 1.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
!ENDIF
IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
ENDDO
ENDDO
ELSE IF( Lub_param .EQ. 3)THEN
! Newtonian input parameters ac Holmes et al Transient EHL point contact analysis 2003, Ball
DO J=1,NN,SS
DO I=1,NX,SS
! Roelands equation acc Holmes
EDAx(I,J)=EXP(LOG(EDA0/kH)*((1+xH*PH*P(I,J))**Z-1))
EDAy(I,J)=EDAx(I,J) !EXP(LOG(EDA0/kH)*((1+xH*PH*P(I,J))**Z-1))
! D-H Formulation acc Homes et al
!RO(I,J)=(1 + gH*PH*P(I,J))/(1+lH*P(I,J)*PH)
RO(I,J)=1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J))
xi(I,J)=0.0
!
!IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
!ENDIF
!
!IF ( RO(I,J) .LT. 1.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
!ENDIF
!
IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
ENDDO
ENDDO
ELSE IF( Lub_param .EQ. 4 )THEN ! No temperature adjustments !This one is changed from the EHL vesion
! R.Larssons 2000 formulation
DO J=1,NN,SS
DO I=1,NX,SS
RL_Ta=temp(I,J)
! Roelands equation acc R.Larsson
EDA0 = 10**(-4.2+RL_G0*(1.0+RL_Ta/135.0)**S0) ! Eq (3)
Z=Dz+Cz*log10(1.0+RL_Ta/135)
ENDA=12 *Um * RX**2 / ( B**3*PH) ! *EDA0 but EDA0 is included in EPSx
EDAx(I,J)=EDA0*EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
EDAy(I,J)=EDAx(I,J)!EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
! D-H Formulation acc R.Larsson
EpsT = EpsT0*exp(-RL_c*P(I,J)*PH)
RO(I,J) = (1.0+RA1*PH*P(I,J)/(1.0+RA2*PH*P(I,J)))*(1.0-EpsT*(RL_Ta-RL_T0))
xi(I,J)=0.0
!
!IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
!ENDIF
!
!IF ( RO(I,J) .LT. 0.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
!ENDIF
IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
ENDDO
ENDDO
! ELSE IF(lub_param .EQ. 4 .and. l_stab .NE. 0) then ! Themperature rise
!
! ub= 2*um-ua
! u_slip=ua-ub
!
! DO J=1,NN,SS
! DO I=1,NX,SS
! temp_iter=0 ! Resetting counter
! temp_0=temp(1,1) ! The global temperature
!
! ! Ensure that the lubrication can not cool off downstream.
!777 IF( L_stab .EQ. 2 .AND. t .LE. -2 .and. I .GT. 1 ) Then
! temp(I,j)=max(temp(i,j),temp(I-SS,J)) ! Do not update if higher temp
! temp_0=temp(I-SS,J)
! ENDIF
!
! RL_Ta=temp(I,J) ! Extract the temperature
!
! ! Roelands equation acc R.Larsson
! EDA0 = 10**(-4.2+RL_G0*(1+RL_Ta/135)**S0) ! Eq (3)
! ENDA=12 *Um * RX**2 / ( B**3*PH) ! *EDA0 but EDA0 is included in EPSx
!
! EDAx(I,J)=EDA0*EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
! EDAy(I,J)=EDAx(I,J)!EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
!
! ! D-H Formulation acc R.Larsson
! EpsT=EpsT0*exp(-RL_c*P(I,J)*PH)
! RO(I,J)=(1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J)))*(1-EpsT*(RL_Ta-RL_T0))
! xi(I,J)=0.0
!
!
! IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
! ENDIF
!
! IF ( RO(I,J) .LT. 0.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
! ENDIF
!
! IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) then
! EDAx(I,J)=EDA_cont !If contact ensure high viscosity
!
! ELSE IF( temp_iter .LE. 10 .AND. SS .LE. 2) THEN ! Might be good to introduce this after the coursest solution is obtained.
!
! ! Define nodenumbers for past and next nodes
! J0=J-SS
! IF( J0 .LE. 0) J0=J+SS
! J2=J-2*SS
! IF( J2 .LE. 0) J2=J0
! J1=J+1*SS
! IF( J1 .GE. NYs) J1=NYs-SS
! JJ=NYs+1-J
! IF( JJ .LE. 1) JJ=1+SS
!
! I0=I-1*SS
! IF( I0 .LE. 0) I0=1
! I2=I-2*SS
! IF( I2 .LE. 0) I2=I0
! I1=I+1*SS
! IF( I1 .GE. NX) I1=NX
!
! dPdx=(term4*P(I1,J)+term3*P(I,J)+term2*P(I0,J)+term1*P(I2,J))/(2*DX*SS)*Ph/b
! dPdy=(term4*P(I,J1)+term3*P(I,J)+term2*P(I,J0)+term1*P(I,J2))/(2*DX*SS)*Ph/b
!
! h_real=H(I,J)*b**2/Rx
! tau_x_f = abs(-h_real/2*dPdx+EDAX(I,j)*u_slip/h_real)
! tau_y_f = abs(-h_real/2*dPdy)
! tau_x_c = abs( h_real/2*dPdx+EDAX(I,j)*u_slip/h_real)
! tau_y_c = abs( h_real/2*dPdy)
!
!
! if( (tau_x_f .GT. shear_max .or. tau_y_f .gt. shear_max .or. tau_x_c .gt. shear_max .OR. tau_y_c .GT. shear_max) .AND. temp(i,j) .LT. temp_max) then
!
! temp(I,J)=temp(I,J)+5
! RL_Ta=temp(I,J)
! ! Roelands equation acc R.Larsson
! EDA0 = 10**(-4.2+RL_G0*(1+RL_Ta/135)**S0) ! Eq (3)
! ENDA=12 *Um * RX**2 / ( B**3*PH) ! *EDA0 but EDA0 is included in EPSx
!
! EDAx(I,J)=EDA0*EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
! EDAy(I,J)=EDAx(I,J)!EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
!
! ! D-H Formulation acc R.Larsson
! EpsT=EpsT0*exp(-RL_c*P(I,J)*PH)
! RO(I,J)=(1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J)))*(1-EpsT*(RL_Ta-RL_T0))
!
!
! IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
! ENDIF
!
! IF ( RO(I,J) .LT. 0.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
! ENDIF
!
! IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
! EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
! EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
!
!
!
! temp_iter=temp_iter+1
! GO TO 777
! elseif( (tau_x_f .LT. shear_min .AND. tau_y_f .LT. shear_min .AND. tau_x_c .LT. shear_min .AND. tau_y_c .LT. shear_min) .AND. temp(i,j) .GT. temp_0) then
!
! temp(I,J)=temp(I,J)-2
! RL_Ta=temp(I,J)
! ! Roelands equation acc R.Larsson
! EDA0 = 10**(-4.2+RL_G0*(1+RL_Ta/135)**S0) ! Eq (3)
! ENDA=12 *Um * RX**2 / ( B**3*PH) ! *EDA0 but EDA0 is included in EPSx
!
! EDAx(I,J)=EDA0*EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
! EDAy(I,J)=EDAx(I,J)!EXP((LOG(EDA0)+9.67)*(-1.0+(1.0+5.1E-9*P(I,J)*PH)**Z))
!
! ! D-H Formulation acc R.Larsson
! EpsT=EpsT0*exp(-RL_c*P(I,J)*PH)
! RO(I,J)=(1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J)))*(1-EpsT*(RL_Ta-RL_T0))
!
!
! IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
! ENDIF
!
! IF ( RO(I,J) .LT. 0.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
! ENDIF
!
! IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
! EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
! EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
!
!
! temp_iter=temp_iter+1
! GO TO 777
! endif
! ENDIF
! EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
! EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
!
!
! ENDDO
! ENDDO
!
! !Mirroring the temperature
! DO J=1,NN,SS
! JJ=NYs-J+1
! DO I=1,NX,SS
! temp(I,JJ)=temp(I,J)
! ENDDO
!ENDDO
ELSE IF( Lub_param .EQ. 5) THEN
! Yasutomi lubrication
DO J=1,NN,SS
DO I=1,NX,SS
! Yasutomi equations
Tg=Tg0+YA1*LOG(1+YA2*PH*P(I,J))
pg=1/YA2*(EXP((1/YA1)*((T40*(1-Tcvot)+Tcvot*Temp(I,J))-Tg0))-1)
YF=1-YB1*LOG(1+YB2*PH*P(I,J))
! Since for some specific combinations of p and YF EDA33 gest biger than EDA22 eaven do p < pg this formulation should be better.
IF (P(I,J)*PH .GT. pg) THEN
EDA22=Yedag*EXP(Yalfag*(P(I,J)*PH-pg))
ELSE
EDA33=Yedag*10**(-(YC1*((T40*(1-Tcvot)+Tcvot*Temp(I,J))-Tg)*YF) / (YC2+((T40*(1-Tcvot)+Tcvot*Temp(I,J))-Tg)*YF))
EDA22=Yedag*EXP(Yalfag*1)
if (EDA22 .lt. EDA33) then
EDA1 = EDA22
else
EDA1 = EDA33
endif
ENDIF
EDAx(I,J)=EDA1 ! No Non-newtonian reduction.
! IF (EDAx(I,J) .LE. 0.0) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J ,'EDA1 = ', EDA1
! EDAx(I,J)=0.1
! Call Stop_to_large_out
!ENDIF
!
! D-H Formulation acc P.Ehret D.Dowsin and C.M. Taylor
RO(I,J)=1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J))
IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
EPSy(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
ENDDO
ENDDO
ELSE IF( Lub_param .EQ. 6) THEN
! Newtonian acc N Deolalikers contact paper from 2008
DO J=1,NN,SS
DO I=1,NX,SS
! Roelands equation acc X.Tan and Venner
EDAx(I,J)=EXP(log(EDA0+9.67)*((1+P(I,J)*PH/Pref)**Z-1))
if (EDAx(I,J) .GT. 1E32) EDAx(I,J)=1E32 ! To limit the viscosity to som reasonable? values. Intended to increase convergense.
EDAy(I,J)=EDAx(I,J)
! D-H Formulation acc X.Tan and N Deolaliker
! RO(I,J)=(5.9E8+1.34*P(I,J)*PH)/(5.9E8+P(I,J)*PH)
RO(I,J)=1+RA1*PH*P(I,J)/(1+RA2*PH*P(I,J))
xi(I,J)=0.0
!IF (EDAx(I,J) .LE. 0.0 .OR. isnan(EDAx(I,J)) ) THEN
! WRITE(4,*)'BAD EDAx', EDAx(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0
! EDAx(I,J)=0.1
! Call Stop_to_large_out
!ENDIF
!
!IF ( RO(I,J) .LT. 1.0 .OR. isnan(RO(I,J))) THEN
! WRITE(4,*)'BAD RO', RO(I,J), 'For I J = ', I ,J , 'P = ', P(I,J), 'H = ', H(I,J), 'EDAO = ',EDA0, 'EpsT =', EpsT
! RO(I,J)=1.0
! Call Stop_to_large_out
!ENDIF
IF(contact(I,J) .EQ. 1 .and. EDAx(I,J) .LT. EDA_cont) EDAx(I,J)=EDA_cont !If contact ensure high viscosity
EPSx(I,J)=RO(I,J)*H(I,J)**3/(ENDA*EDAx(I,J))
EPSy(I,J)=EPSx(I,J)!RO(I,J)*H(I,J)**3/(ENDA*EDAy(I,J))
ENDDO
ENDDO
ENDIF
! !Mirroring the viscosity
DO J=1,NN,SS
JJ=NYs-J+1
DO I=1,NX,SS
EDAx(I,JJ)=EDAx(I,J)
EDAy(I,JJ)=EDAy(I,J)
ENDDO
ENDDO
RETURN
END