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Injection of particles from surfaces direction

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Now, if no normal is provided to an injection in the input file, the
velocity direction of the particles is chosen to be the surface normal.

This allows to inject particles from curves, corners... without having
to provide a direction or declaring multiple injections.
This commit is contained in:
Jorge Gonzalez 2023-02-03 14:03:22 +01:00
commit bc2c29092a
4 changed files with 44 additions and 20 deletions
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doc/user-manual/fpakc_UserManual.pdf
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3
doc/user-manual/fpakc_UserManual.tex
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@ -608,7 +608,8 @@ make
\item \textbf{n}: Real.
Array dimension $3$.
Direction of injection.
This vector is normalized to $1$.
If no value is provided, the normal of the edge is used as the direction of injection.
This vector is normalized to $1$ by the code.
\item \textbf{velDist}: Character.
Array dimension $3$.
Type of distribution function used to obtain injected particle velocity:

15
src/modules/init/moduleInput.f90
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@ -1140,6 +1140,7 @@ MODULE moduleInput
CHARACTER(:), ALLOCATABLE:: name
REAL(8):: v
REAL(8), ALLOCATABLE:: T(:), normal(:)
LOGICAL:: fixDirection
REAL(8):: flow
CHARACTER(:), ALLOCATABLE:: units
INTEGER:: physicalSurface
@ -1160,11 +1161,18 @@ MODULE moduleInput
CALL config%get(object // '.v', v, found)
CALL config%get(object // '.T', T, found)
CALL config%get(object // '.n', normal, found)
IF (found) THEN
fixDirection = .TRUE.
ELSE
fixDirection = .FALSE.
ALLOCATE(normal(1:3))
normal = 0.D0
END IF
CALL config%get(object // '.flow', flow, found)
CALL config%get(object // '.units', units, found)
CALL config%get(object // '.physicalSurface', physicalSurface, found)
CALL inject(i)%init(i, v, normal, T, flow, units, sp, physicalSurface)
CALL inject(i)%init(i, v, normal, fixDirection, T, flow, units, sp, physicalSurface)
CALL readVelDistr(config, inject(i), object)
@ -1240,13 +1248,12 @@ MODULE moduleInput
SELECT CASE(fvType)
CASE ("Maxwellian")
v = inj%vMod*inj%n(i)
T = inj%T(i)
CALL initVelDistMaxwellian(inj%v(i)%obj, v, t, m)
CALL initVelDistMaxwellian(inj%v(i)%obj, t, m)
CASE ("Delta")
v = inj%vMod*inj%n(i)
CALL initVelDistDelta(inj%v(i)%obj, v)
CALL initVelDistDelta(inj%v(i)%obj)
CASE DEFAULT
CALL criticalError("No velocity distribution type " // fvType // " defined", 'readVelDistr')

40
src/modules/moduleInject.f90
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@ -29,7 +29,6 @@ MODULE moduleInject
!Maxwellian distribution function
TYPE, EXTENDS(velDistGeneric):: velDistMaxwellian
REAL(8):: v !Velocity
REAL(8):: vTh !Thermal Velocity
CONTAINS
PROCEDURE, PASS:: randomVel => randomVelMaxwellian
@ -38,7 +37,6 @@ MODULE moduleInject
!Dirac's delta distribution function
TYPE, EXTENDS(velDistGeneric):: velDistDelta
REAL(8):: v !Velocity
CONTAINS
PROCEDURE, PASS:: randomVel => randomVelDelta
@ -51,6 +49,7 @@ MODULE moduleInject
REAL(8):: vMod !Velocity (module)
REAL(8):: T(1:3) !Temperature
REAL(8):: n(1:3) !Direction of injection
LOGICAL:: fixDirection !The injection of particles has a fix direction defined by n
INTEGER:: nParticles !Number of particles to introduce each time step
CLASS(speciesGeneric), POINTER:: species !Species of injection
INTEGER:: nEdges
@ -69,7 +68,7 @@ MODULE moduleInject
CONTAINS
!Initialize an injection of particles
SUBROUTINE initInject(self, i, v, n, T, flow, units, sp, physicalSurface)
SUBROUTINE initInject(self, i, v, n, fixDirection, T, flow, units, sp, physicalSurface)
USE moduleMesh
USE moduleRefParam
USE moduleConstParam
@ -81,6 +80,7 @@ MODULE moduleInject
CLASS(injectGeneric), INTENT(inout):: self
INTEGER, INTENT(in):: i
REAL(8), INTENT(in):: v, n(1:3), T(1:3)
LOGICAL, INTENT(in):: fixDirection
INTEGER, INTENT(in):: sp, physicalSurface
REAL(8):: tauInject
REAL(8), INTENT(in):: flow
@ -91,7 +91,12 @@ MODULE moduleInject
self%id = i
self%vMod = v / v_ref
IF (.NOT. fixDirection) THEN
self%n = n / NORM2(n)
ELSE
self%n = 0.D0
END IF
self%fixDirection = fixDirection
self%T = T / T_ref
self%species => species(sp)%obj
tauInject = tau(self%species%n)
@ -197,23 +202,22 @@ MODULE moduleInject
END SUBROUTINE doInjects
SUBROUTINE initVelDistMaxwellian(velDist, v, T, m)
SUBROUTINE initVelDistMaxwellian(velDist, T, m)
IMPLICIT NONE
CLASS(velDistGeneric), ALLOCATABLE, INTENT(out):: velDist
REAL(8), INTENT(in):: v, T, m
REAL(8), INTENT(in):: T, m
velDist = velDistMaxwellian(v = v, vTh = DSQRT(T/m))
velDist = velDistMaxwellian(vTh = DSQRT(T/m))
END SUBROUTINE initVelDistMaxwellian
SUBROUTINE initVelDistDelta(velDist, v)
SUBROUTINE initVelDistDelta(velDist)
IMPLICIT NONE
CLASS(velDistGeneric), ALLOCATABLE, INTENT(out):: velDist
REAL(8), INTENT(in):: v
velDist = velDistDelta(v = v)
velDist = velDistDelta()
END SUBROUTINE initVelDistDelta
@ -226,7 +230,7 @@ MODULE moduleInject
REAL(8):: v
v = 0.D0
v = self%v + self%vTh*randomMaxwellian()
v = self%vTh*randomMaxwellian()
END FUNCTION randomVelMaxwellian
@ -237,7 +241,7 @@ MODULE moduleInject
CLASS(velDistDelta), INTENT(in):: self
REAL(8):: v
v = self%v
v = 0.D0
END FUNCTION randomVelDelta
@ -256,6 +260,7 @@ MODULE moduleInject
INTEGER:: i
INTEGER:: n, sp
CLASS(meshEdge), POINTER:: randomEdge
REAL(8):: direction(1:3)
!Insert particles
!$OMP SINGLE
@ -300,10 +305,21 @@ MODULE moduleInject
!Assign particle type
partInj(n)%species => self%species
partInj(n)%v = (/ self%v(1)%obj%randomVel(), &
IF (self%fixDirection) THEN
direction = self%n
ELSE
direction = randomEdge%normal
END IF
partInj(n)%v = self%vMod*direction + (/ self%v(1)%obj%randomVel(), &
self%v(2)%obj%randomVel(), &
self%v(3)%obj%randomVel() /)
print *, direction
print*, partInj(n)%v
!Obtain natural coordinates of particle in cell
partInj(n)%Xi = mesh%cells(partInj(n)%cell)%obj%phy2log(partInj(n)%r)
!Push new particle with the minimum time step