GridGenerator::Airfoil::AdditionalData Struct Reference

#include <deal.II/grid/grid_generator.h>

Public Member Functions
	AdditionalData ()
void	add_parameters (ParameterHandler &prm)

Public Attributes
std::string	airfoil_type
std::string	naca_id
Point< 2, double >	joukowski_center
double	airfoil_length
double	height
double	length_b2
double	incline_factor
double	bias_factor
unsigned int	refinements
unsigned int	n_subdivision_x_0
unsigned int	n_subdivision_x_1
unsigned int	n_subdivision_x_2
unsigned int	n_subdivision_y
unsigned int	airfoil_sampling_factor

Detailed Description

AdditionalData collects all settings that are required to generate a airfoil triangulation with the functions Airfoil::create_triangulation().

Definition at line 2465 of file grid_generator.h.

Constructor & Destructor Documentation

AdditionalData()

GridGenerator::Airfoil::AdditionalData::AdditionalData

(

)

Constructor.

Member Function Documentation

add_parameters()

void GridGenerator::Airfoil::AdditionalData::add_parameters

(

ParameterHandler &

prm

)

This function adds the ParameterHandler entries.

Parameters

[in]

prm

Parameter handler.

Member Data Documentation

airfoil_type

std::string GridGenerator::Airfoil::AdditionalData::airfoil_type

Type of the airfoil: either "NACA" or "Joukowksi" to choose airfoil geometry among NACA and Joukowski airfoil.

Definition at line 2471 of file grid_generator.h.

naca_id

std::string GridGenerator::Airfoil::AdditionalData::naca_id

NACA serial number defining the airfoil shape.

Note

Currently serial numbers with length 4 are supported. A good overview of NACA serial numbers is presented in Wikipedia (https://en.wikipedia.org/wiki/NACA_airfoil)

Definition at line 2480 of file grid_generator.h.

joukowski_center

Point<2, double> GridGenerator::Airfoil::AdditionalData::joukowski_center

Center of Joukowski circle.

Note

A center on the x-axis leads to a symmetrical airfoil.

Definition at line 2487 of file grid_generator.h.

airfoil_length

double GridGenerator::Airfoil::AdditionalData::airfoil_length

Chord length of the airfoil, i.e. distance from leading to trailing edge.

Definition at line 2493 of file grid_generator.h.

height

double GridGenerator::Airfoil::AdditionalData::height

Vertical distance from airfoil chord to upper boundary of the mesh i.e. half of the total mesh height.

Definition at line 2499 of file grid_generator.h.

length_b2

double GridGenerator::Airfoil::AdditionalData::length_b2

Length of mesh from the airfoil trailing edge to outflow boundary.

Definition at line 2504 of file grid_generator.h.

incline_factor

double GridGenerator::Airfoil::AdditionalData::incline_factor

Factor defining the inclination HG of the coarse grid The figure shows the upper coarse grid with two different inclinations

• incline_factor = 0 --> face HG
• incline_factor = 0.5 --> face HG' Coordinate of point G' is defined by incline_factor after interpolation G'(0) = G(0) + incline_factor * (K(0) - G(0)) with incline_factor in [0,1).

         o-----G---G'--K
      /  |     |  /    |
    /    o     | /     |
  /    /    \  |/      |
  

  o-—o H----—o

Definition at line 2521 of file grid_generator.h.

bias_factor

double GridGenerator::Airfoil::AdditionalData::bias_factor

Factor to receive a finer mesh around the airfoil by increasing bias_factor b. Bias function: f(x) = tanh(bx) / tanh(x) with x in [0,1], leads to a compression of values close to x = 1.

Definition at line 2529 of file grid_generator.h.

refinements

unsigned int GridGenerator::Airfoil::AdditionalData::refinements

Number of global refinements.

Definition at line 2534 of file grid_generator.h.

n_subdivision_x_0

unsigned int GridGenerator::Airfoil::AdditionalData::n_subdivision_x_0

Number of subdivisions along the airfoil in left block.

Definition at line 2539 of file grid_generator.h.

n_subdivision_x_1

unsigned int GridGenerator::Airfoil::AdditionalData::n_subdivision_x_1

Number of subdivisions along the airfoil in middle block.

Definition at line 2544 of file grid_generator.h.

n_subdivision_x_2

unsigned int GridGenerator::Airfoil::AdditionalData::n_subdivision_x_2

Number of subdivisions in block right of the airfoil.

Definition at line 2549 of file grid_generator.h.

n_subdivision_y

unsigned int GridGenerator::Airfoil::AdditionalData::n_subdivision_y

Number of subdivisions normal to the airfoil contour.

Definition at line 2554 of file grid_generator.h.

airfoil_sampling_factor

unsigned int GridGenerator::Airfoil::AdditionalData::airfoil_sampling_factor

Factor to enhance the approximation of the airfoil geometry that happens when interpolating provided nonequidistant airfoil points to equidistant airfoil points. When generating the required vector consisting the equidistant airfoil points, it is interpolated between nonequidistand airfoil points. Increasing the provided nonequidistant airfoil points leads to a better approximation of the airfoil geometry. Parameter "airfoil_sampling_factor" thereby defines the relation of provided_nonequidistant_points to required_equidistant_points.

Definition at line 2567 of file grid_generator.h.

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

• include/deal.II/grid/grid_generator.h