Immersed Boundary Condition

Namespaces
module	mod_immersed_boundary_condition_tools
	Tools to manipulate immersed boundaries variables.
module	mod_prepare_immersed_boundary_condition
	Immersed Boundaries variable initializers.
module	mod_setup_cell_ibm_saved_variables
	Interface to prepare immersed boundary variables.
module	type_immersed_boundary_condition
	Data types for immersed boundaries.

Classes
type	type_immersed_boundary_condition::t_immersed_boundary_condition
	Field-related information to immersed boundary. More...
type	type_immersed_boundary_condition::t_face_immersed_boundary_condition
	Store ibc-related variable data. More...

Enumerations
enum	{ enum_ibc_type::ibc_type_dirichlet , enum_ibc_type::ibc_type_neumann , enum_ibc_type::ibc_type_wall , enum_ibc_type::ibc_interpolation_type }
	Types of immersed boundaries. More...
enum	{ enum_ibc_method::ibc_method_volume_penalization , enum_ibc_method::ibc_method_lagrange_interpolation , enum_ibc_method::ibc_method_linear_or_quadratic_interpolation }
	Methods for immersed boundaries. More...

Detailed Description

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
ibc_type_dirichlet	Dirichlet boundary condition.
ibc_type_neumann	Neumann boundary condition.
ibc_type_wall	Wall boundary condition.
ibc_interpolation_type	Special flag for IBM interpolation. Equivalent to Dirichlet.

anonymous enum

anonymous enum

The goal of the different methods is to compute a value of the considered unkwown on ghost nodes thanks a boundary condition and values at inner nodes.

A. Dirichlet boundary condition

1. Direct method

Values at the boundary point (B) are interpolated using 2D(-3D) Lagrange polynomials.

1. Linear/Quadratic interpolation method

Values at the boundary point (B) are interpolated as follow:

G     B         P
|-----|---------|
   α      1-α

where the probe point (P) is interpolated using 2D(-3D) Lagrange polynomials. The boundary point value is then given by:

u_B = α u_P + (1-α) u_G

For quadratic interpolation method, values at the boundary point (B) are interpolated with 3 points G,P, and P2:

G     B         P          P2
|-----|---------|----------|

where the probe point (P and P2) are interpolated using 2D(-3D) Lagrange polynomials. The boundary point value is then given by:

u_B = m u_P + + n u_P2 + l u_G

B. Neumann boundary conditions

Todo:

C. Volume penalization method

Todo:

Enumerator
ibc_method_volume_penalization	Volume penalization method.
ibc_method_lagrange_interpolation	Lagrange interpolation method.
ibc_method_linear_or_quadratic_interpolation	Linear/quadratic interpolation method.