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main.f90
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main.f90
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!-------------- cemfDEM code: a dem simulation code ----------------------------
! D C enter of
! D M E ngineering and
! D M M ultiscale modeling of
! D M F luid flow
! EEEEEEEEM .ir
!------------------------------------------------------------------------------
! Copyright (C): cemf
! website: www.cemf.ir
!------------------------------------------------------------------------------
! This file is part of cemfDEM code. It is a free software for simulating
! granular flow. You can redistribute it and/or modify it under the terms of
! GNU General Public License version 3 or any other later versions.
!
! cemfDEM code is distributed to help others in their research in the field
! of granular flow, but WITHOUT ANY WARRANTY; without even the implied
! warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!------------------------------------------------------------------------------
program main
use g_DEMSystem
use g_stl_reader
use g_Prtcl_PureProperty
implicit none
integer(IK) i
real(RK) Y, pr, G
logical res
type(real3) minDomain, maxDomain
type(PS_Distribution), pointer:: PSD
type(PSD_Property), pointer:: PSDP
class(PhysicalProperty),pointer:: Property
class(Geometry), pointer:: geom
type(real3) p1, p2, p3, p4
type(PlaneWall) insPlane
type(PureProperty) prop
type(DEMS_Options) DEM_opt
type(DEMSystem) DEM
!//// Initial settings
! options and settings for DEM simulation
DEM_opt%gravity = real3( 0.0, -9.8 , 0.0 )
DEM_opt%SaveFreq = 1000
DEM_opt%RunName = "PackingBinary"
DEM_opt%Res_Dir = "./Results/"
DEM_opt%OutputFileType = OP_Type_VTK !+ OP_Type_Tec
DEM_opt%CT_model = CTM_ConstantTorque
DEM_opt%CF_Type = CFT_LSD_l
DEM_opt%CS_Method = CSM_NBS_Munjiza_Hrchl ! for a system with size distribution
DEM_opt%PI_Method = PIM_AB3AM4
DEM_opt%PRI_Method= PIM_AB3AM4
!//// properties of particles and walls
Y = 1000000.0_RK ! Young's modulus
pr = 0.23_RK ! Poisson's ratio
G = Y/(2*(1+pr)) ! shear modulus
call prop%set_prop(2500.0_RK, Y , G , pr , 0.0_RK)
!//// particles
allocate(PSD)
! bimodal particles with d1 = 7 mm and d2 = 3.5 mm
! total number of particles is (7+8)*1000 = 15K
!PSD = (PS_Distribution( 7 , PSD_Uniform, 1 , 0.007_RK, 0.007_RK ) + &
! PS_Distribution( 8 , PSD_Uniform, 1 , 0.0035_RK, 0.0035_RK ) ) * 1000
!particles with uniform size distribution
!Size range of particles is between 3 and 7.5 mm which are classified into 5 bins
PSD = PS_Distribution( 15000 , PSD_Uniform, 5 , 0.003_RK, 0.0075_RK )
! associates particle size distribution with a property set
allocate(PSDP)
PSDP = PSD_Property( PSD , prop )
deallocate(PSD)
!// main components of DEM system
!//// geometry
allocate(geom)
call ProgramDefinedGeometry(geom)
!//// Property
allocate( Property )
call Property%ParticleProperty( PSDP ) ! particles
call Property%WallProperty(1 , (/prop/) ) ! walls
call Property%PP_BinaryProp(DEM_opt, 0.2_RK, 0.1_RK, 0.8_RK, 0.8_RK) ! binary pp
call Property%PW_BinaryProp(DEM_opt, 0.3_RK, 0.1_RK, 0.8_RK, 0.8_RK) ! binary pw
!//// DEM system with particle insertion
! simulation domain
minDomain = real3(-0.077, -0.01, -0.077)
maxDomain = real3( 0.077 , 0.21 , 0.077)
! insertion plane
p1 = real3(-0.05, 0.18, -0.05)
p2 = real3(-0.05, 0.18, 0.05)
p3 = real3( 0.05, 0.18, 0.05)
p4 = real3( 0.05, 0.18, -0.05)
res = insPlane%CreateWall_nv(p4,p3,p2,p1)
! initializes DEM system, dt = 0.00001 sec, particles are inserted in 150k iterations with initial velocity of 0.3 m
call DEM%Initialize( 0.00001_RK, PSDP, insPlane, 150000 , 0.3_RK ,geom, Property, minDomain, maxDomain, DEM_opt )
!//// iteration loop for 2.5 seconds
call DEM%iterate(250000)
end program