m_particle_cloud Module Reference

Generates particle beds by converting particle_cloud patch specifications into individual immersed boundary patches before domain reduction. Each rank runs the same deterministic placement so no MPI broadcast of particle positions is needed. More...

Functions/Subroutines
impure subroutine, public	s_generate_particle_clouds (particle_cloud_ibs)
	Generate all particle beds and fill particle_cloud_ibs. Called on all ranks before s_reduce_ib_patch_array.
subroutine	s_particle_cloud_random_box (cloud_idx, ib_idx, particle_cloud_ibs)
	Generates a random distributions of particles in a box with a minimum spacing.
real(wp) function	f_xorshift (seed)
	Xorshift PRNG. Advances seed in-place and returns a value in [0, 1).
integer function	f_bin_hash (bx, by, bz, hash_size)
	Hash bin coordinates to a 1-indexed slot in [1, hash_size]. Uses large prime multipliers to spread bins across buckets. Hash collisions are benign: the distance check catches false neighbours.

Detailed Description

Generates particle beds by converting particle_cloud patch specifications into individual immersed boundary patches before domain reduction. Each rank runs the same deterministic placement so no MPI broadcast of particle positions is needed.

Function/Subroutine Documentation

f_bin_hash()

integer function m_particle_cloud::f_bin_hash ( integer, intent(in) bx, integer, intent(in) by, integer, intent(in) bz, integer, intent(in) hash_size )

private

Hash bin coordinates to a 1-indexed slot in [1, hash_size]. Uses large prime multipliers to spread bins across buckets. Hash collisions are benign: the distance check catches false neighbours.

Definition at line 220 of file m_particle_cloud.fpp.f90.

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f_xorshift()

real(wp) function m_particle_cloud::f_xorshift ( integer, intent(inout) seed )

private

Xorshift PRNG. Advances seed in-place and returns a value in [0, 1).

Definition at line 205 of file m_particle_cloud.fpp.f90.

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s_generate_particle_clouds()

impure subroutine, public m_particle_cloud::s_generate_particle_clouds

(

type(ib_patch_parameters), dimension(:), intent(out), allocatable

particle_cloud_ibs

)

Generate all particle beds and fill particle_cloud_ibs. Called on all ranks before s_reduce_ib_patch_array.

Definition at line 24 of file m_particle_cloud.fpp.f90.

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s_particle_cloud_random_box()

subroutine m_particle_cloud::s_particle_cloud_random_box ( integer, intent(in) cloud_idx, integer, intent(inout) ib_idx, type(ib_patch_parameters), dimension(:), intent(inout) particle_cloud_ibs )

private

Generates a random distributions of particles in a box with a minimum spacing.

Definition at line 59 of file m_particle_cloud.fpp.f90.

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