GROUP 1. Run title and other preliminaries
TEXT(Injection In Channel By In-Form.
TITLE
DISPLAY
This example illustrates a use of In-Form for the introduction
of input boundary conditions for TEM1 variable.
As a problem is considered injection into a plane flow.
!
! !
\!/ \!/ Wall \!/
/////////////////////////////////////////////////////
Non-uniform -----------------------------------------------------
specified -> ->
mass-flux --> -->
and ---> --->
velocity - - - - - - - - - - -Symmetry plane - - - - - - - - -
^ y
|-------> x-direction
The inlet flow has a parabolic structure. Inflowing gas has
TEMINL temperature. It is supposed that the specific heat of
the inflowing material is the same as that in domain. In this
case it is enough to specify the inlet temperature value only
in a boundary condition. EARTH automatically multiplies the
inflow temperature TEMINL by the specific heat which prevails
in the cells into which the mass is flowing.
The injection size on a wall is increased proportionally
to its length. Injecting gas has TEMINJ temperature. It is
supposed that injecting gas has the CPINJ specific heat
distinguished from that inside the domain. In this case
in the boundary condition it should multiply the injecting
temperature value on the injecting specific heat and to use
the special name of the PATCH command of which begins on 'NOCP'.
The Q1 contains PHOTON USE commands
ENDDIS
PHOTON USE
p
phi
1 8 1
msg picture is enlarged 8 times in y direction
gr ou z 1
msg contours of TEM1
con tem1 z 1 fi;0.001;upause 2
msg velocity vectors
vec z 1
enduse
REAL(VELMAX,VELINJ,TEMINL,TEMINJ,CPINJ)
VELMAX=0.5 ! maximum of inlet velocity
VELINJ=0.1 ! maximum of injecting velocity
TEMINL=0.0 ! temperature of inlet gas
TEMINJ=1.0 ! temperature of injecting gas
CPINJ=5000. ! specific heat of injecting gas
GROUP 3. X-direction grid specification
GRDPWR(X,20,0.2,1.0)
GROUP 4. Y-direction grid specification
GRDPWR(Y,20,0.01,1.0)
GROUP 7. Variables stored, solved & named
** Solve three extra variables as temperatures with
different Prandtl numbers.
SOLVE(P1,V1,U1,TEM1)
GROUP 9. Properties of the medium (or media)
SETPRPS(1, 0)
GROUP 13. Boundary conditions and special sources
Inlet !
PATCH(INL,WEST,1,1,1,NY,1,1,1,1)
(SOURCE of P1 at INL is RHO1*VELMAX*(1.-(YG/YVLAST)^2))
(SOURCE of U1 at INL is VELMAX*(1.-(YG/YVLAST)^2) with ONLYMS)
(SOURCE of V1 at INL is 0.0 with ONLYMS)
(SOURCE of TEM1 at INL is TEMINL with ONLYMS)
Injection
PATCH(NOCPINJ,NORTH,1,NX,NY,NY,1,NZ,1,1)
(SOURCE of P1 at NOCPINJ is RHO1*VELINJ*XG/XULAST)
(SOURCE of V1 at NOCPINJ is -VELINJ*XG/XULAST with ONLYMS)
(SOURCE of TEM1 at NOCPINJ is TEMINJ*CPINJ with ONLYMS)
Wall
PATCH(NW,NORTH,1,NX,NY,NY,1,NZ,1,1)
(SOURCE of U1 at NW is 0.0 with LAMWALL)
Outlet
PATCH(OUT,EAST,NX,NX,1,NY,1,NZ,1,1)
(SOURCE of P1 at OUT is 1000.*(0.-P1) with LINE)
GROUP 15. Termination of sweeps
LSWEEP=50
SELREF=T; RESFAC=0.1
GROUP 17. Under-relaxation devices
RELAX(U1,FALSDT,0.1); RELAX(V1,FALSDT,0.1)
GROUP 22. Spot-value print-out
IYMON=19; IXMON=10; TSTSWP=-1
distil=t
EX(P1)=1.626E+00; EX(U1)=6.584E-01
EX(V1)=3.250E-02; EX(TEM1)=2.689E+00
#conprom
#maxabs
#endpause