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INPUTS.f90
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INPUTS.f90
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FUNCTION COAGKERNEL(x1,y1,x2,y2,time)
!----------------------------------------------------------------------------------------------
!
!DESCRIPTION:
!
!This is where the coagulation/aggregation kernel is defined. To adapt as desired.
!See for instance Equation 14.
!
!VARIABLES:
!
!B0 aggregation rate factor
!eij sticking probability between pure particles of i and j
!eff efficiency
!fxi mass fraction of component i
!vi mass of particle i
!
!----------------------------------------------------------------------------------------------
USE GLOBAL
IMPLICIT NONE
!\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
DOUBLE PRECISION, INTENT (IN) :: x1, y1, x2, y2, time
DOUBLE PRECISION :: COAGKERNEL
DOUBLE PRECISION, PARAMETER :: B0=1.0d0
DOUBLE PRECISION :: v1, v2, eff, fx1, fx2, e11=0.8d0, e22=0.1, e12=0.6d0
!\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
v1 = x1 + y1
v2 = x2 + y2
fx1 = x1/v1
fx2 = x2/v2
eff = 1.0d0 !e11*fx1*fx2 + ((1.0d0-fx1)*fx2 + fx1*(1.0d0-fx2))*e12 + (1.0d0-fx1)*(1.0d0-fx2)*e22
COAGKERNEL = B0 !*eff*(2.0d0 + (v1/v2)**(1.0d0/3.0d0) + (v2/v1)**(1.0d0/3.0d0))
END FUNCTION COAGKERNEL
!##############################################################################################
FUNCTION PSDINI(xf,yf)
!----------------------------------------------------------------------------------------------
!
!DESCRIPTION:
!
!Initial condition for the number density function.
!See, for example, Equations 10 and 11 of paper.
!
!VARIABLES:
!
!mi mass of component i
!mi0 mean mass of component i
!N0 initial number of particles per unit volume
!
!----------------------------------------------------------------------------------------------
USE GLOBAL
IMPLICIT NONE
!\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
DOUBLE PRECISION, INTENT (IN) :: xf, yf
DOUBLE PRECISION :: PSDINI
DOUBLE PRECISION :: m1, m2, m10, m20, N0
!\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
m1 = xf
m2 = yf
m10 = 1.0d0
m20 = 1.0d0
N0 = 1.0d0
PSDINI = 4.0d0*N0/(m10*m20)*(m1/m10)*DEXP(-2.0d0*(m1/m10) - (m2/m20))
END FUNCTION PSDINI
!##############################################################################################
FUNCTION EXPO2DMM(m1,m2,m10,m20,N0)
!----------------------------------------------------------------------------------------------
!
!DESCRIPTION:
!
!2D Exponential distribution. Input: mass of each component.
!
!VARIABLES:
!
!mi mass of component i
!mi0 mean mass of component i
!N0 initial number of particles per unit volume
!
!----------------------------------------------------------------------------------------------
IMPLICIT NONE
!\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
DOUBLE PRECISION, INTENT (IN) :: m1, m2, m10, m20, N0
DOUBLE PRECISION :: EXPO2DMM
!\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
EXPO2DMM = N0/(m10*m20)*DEXP(-m1/m10 -m2/m20)
END FUNCTION EXPO2DMM
!##############################################################################################