design_module::design_t Type Reference

The topology type, which is used to describe the designs in topology optimization. More...

Inheritance diagram for design_module::design_t:

Collaboration diagram for design_module::design_t:

Public Member Functions
procedure, pass(this)	init (this, json, case)
	Initialize the topology.
procedure, pass(this)	free (this)
	Free the topology.
procedure, pass(this)	preprocess_ (this, t, tstep)
	Update resistance based on the design.
procedure, pass(this)	compute_ (this, t, tstep)
	Update the design.
procedure, pass(this)	update (this, t, tstep)
	Update the topology.

Public Attributes
class(field_t), pointer, public	chi
	array describing the topology.
class(field_t), pointer, public	design_field
	array describing the topology.
integer	total_size
	Size parameters.
integer	design_size
logical	converged = .false.
	Logical indicating if the design has converged.
logical	design_changed = .false.
	Indication if the design has changed.

Private Attributes
class(point_zone_t), pointer, private	design_domain => null()
	Pointer to the design domain.
real(kind=rp), private	perm_0
real(kind=rp), private	perm_1
real(kind=rp), private	perm_penalty

Detailed Description

Definition at line 59 of file design.f90.

Member Function/Subroutine Documentation

compute_()

procedure, pass(this) design_module::design_t::compute_	(	class(design_t), intent(inout)	this,
		real(kind=rp), intent(in)	t,
		integer, intent(in)	tstep
	)

Todo:

This is currently just a dummy function. We need to implement the actual topology optimization algorithm here.

Definition at line 92 of file design.f90.

free()

procedure, pass(this) design_module::design_t::free

(

class(design_t), intent(inout)

this

)

Definition at line 86 of file design.f90.

init()

procedure, pass(this) design_module::design_t::init	(	class(design_t), intent(inout)	this,
		type(json_file), intent(inout)	json,
		class(case_t), intent(inout), target	case
	)

Parameters

[in,out]	this	The topology
[in]	neko_case	The neko case
[in]	resolution	The resolution of the topology

Definition at line 83 of file design.f90.

preprocess_()

procedure, pass(this) design_module::design_t::preprocess_	(	class(design_t), intent(inout)	this,
		real(kind=rp), intent(in)	t,
		integer, intent(in)	tstep
	)

This function updates the permeability based on the current design. This is done by interpolating the design and updating the pointwise permeability force.

From Andreasen et al. (2008) we have that the permeability is given by

\[ \kappa = \kappa_{0} + (\kappa_{1} - \kappa_{0})\phi(\mathbf{x}) \frac{\beta + 1}{\beta + \phi(\mathbf{x})}, \]

where \(\kappa_{0}\) and \(\kappa_{1}\) are the permeability at solid and fluid, respectively, \(\phi(\mathbf{x})\) is the design variable at point \(\mathbf{x}\), and \(\beta\) is a penalty parameter.

Parameters

[in]

neko_case

The neko case

Definition at line 89 of file design.f90.

update()

procedure, pass(this) design_module::design_t::update	(	class(design_t), intent(inout)	this,
		real(kind=rp), intent(in)	t,
		integer, intent(in)	tstep
	)

Todo:

This is currently just a dummy function. We need to implement the actual topology optimization algorithm here.

Definition at line 95 of file design.f90.

Member Data Documentation

chi

class(field_t), pointer, public design_module::design_t::chi

Definition at line 63 of file design.f90.

converged

logical design_module::design_t::converged = .false.

Definition at line 76 of file design.f90.

design_changed

logical design_module::design_t::design_changed = .false.

Definition at line 78 of file design.f90.

design_domain

class(point_zone_t), pointer, private design_module::design_t::design_domain => null()

private

Definition at line 67 of file design.f90.

design_field

class(field_t), pointer, public design_module::design_t::design_field

Definition at line 65 of file design.f90.

design_size

integer design_module::design_t::design_size

Definition at line 73 of file design.f90.

perm_0

real(kind=rp), private design_module::design_t::perm_0

private

Definition at line 70 of file design.f90.

perm_1

real(kind=rp), private design_module::design_t::perm_1

private

Definition at line 70 of file design.f90.

perm_penalty

real(kind=rp), private design_module::design_t::perm_penalty

private

Definition at line 70 of file design.f90.

total_size

integer design_module::design_t::total_size

Definition at line 73 of file design.f90.

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The documentation for this type was generated from the following file:

• /home/runner/work/neko-top/neko-top/sources/topology_optimization/design.f90