STREAMLINE

Streamlines are massless particles moving along a path with a velocity tangent to the streamline at every point.

Syntax

STREAMLINE(“name”) { parameters}

Qualifier

User-given name

Parameters

display_seeds (boolean): When activated, the seed locations will be displayed as spheres.
seed_type (enum): Method of identifying seed locations; Options: rectangular, rake, from_file.
seed_file (string): If seed type = from_file is selected, path to the file containing seeds.
normal_direction (enum): Used when seed_type=rectangular; Options: x, y, z
x_center (real): x-coordinate of centerpoint of rectangle. Used when seed_type=rectangular.
y_center (real): y-coordinate of centerpoint of rectangle. Used when seed_type=rectangular.
z_center (real): z-coordinate of centerpoint of rectangle. Used when seed_type=rectangular.
x_length (real): Length of rectangle in the x direction. Used when seed_type=rectangular.
y_length (real): Length of rectangle in the y direction. Used when seed_type=rectangular.
z_length (real): Length of rectangle in the z direction. Used when seed_type=rectangular.
x_seeds (integer): Number of seeds equally spaced along the rectangle in the x direction. Used when seed_type=rectangular.
y_seeds (integer): Number of seeds equally spaced along the rectangle in the y direction. Used when seed_type=rectangular.
z_seeds (integer): Number of seeds equally spaced along the rectangle in the z direction. Used when seed_type=rectangular.
x_1 (real): x location of first seed of rake. Used with seed_type = rake.
y_1 (real): y location of first seed of rake. Used with seed_type = rake.
z_1 (real): z location of first seed of rake. Used with seed_type = rake.
x_2 (real): x location of second seed of rake. Used with seed_type = rake.
y_2 (real): y location of second seed of rake. Used with seed_type = rake.
z_2 (real): z location of second seed of rake. Used with seed_type = rake.
num_seeds (integer): Number of seeds to place between two specified points for rake
name (string): User-given name of the command. The instance of a given command is referenced using this parameter.
color_type (enum): Method used to set the display color; Options: constant, contour
constant_color (enum): Display the streamline as a constant color; Options: white, green, blue, magenta, gray, yellow, light_blue, purple, red, black
num_contours (integer): Number of contour lines to be displayed in legend; The limit is 500 contours.
contour_function (string): Scalar quantity to be displayed on streamline (pressure, velocity, and so on)
line_thickness (enum): Thickness of lines for mesh display and feature line display; Options: thin, medium, thick
active_flag (boolean): Read and process the command or ignore it
legend_display (boolean): Flag to toggle on or off the visibility of the legend
num_labels (integer): Number of labels used in legend
legend_min (real): Minimum value in legend
legend_max (real): Maximum value in legend
legend_location (enum): Location of the legend on the image; Options: top_left, top_center, top_right, bottom_left, bottom_center, bottom_right, center_left, center_right
invert_color_map (boolean): Option to invert the colors of the colormap
filled_contours (boolean): Option to display surface with constant colors within a polygon of the surface. If the scalar values change within a polygon, the polygon will then be split and colored appropriately for that polygon.
colormap_name (enum): Colormap name to use for displaying the scalar function values; Options: Cool to Warm, Cool to Warm (Extended), Black-Body Radiation, X Ray, Inferno, Black, Blue and White, Blue Orange, Viridis, Gray and Red, Linear Green, Cold and Hot, Blue – Green – Orange, Rainbow Desaturated, Yellow – Gray – Blue, Rainbow Uniform, Rainbow, Rainbow Legacy

Example

STREAMLINE("upstream rake"){
     calculation_direction      = forward
     time_limit                 = "_none"
     display_seeds              = off
     seed_type                  = rake
     normal_direction           = x
     x_1                        = (xMax-xMin)*.2 + xMin
     y_1                        = yMax*.99
     z_1                        = (zMax-zMin)/2.0 + zMin
     x_2                        = (xMax-xMin)*.2 + xMin
     y_2                        = yMin*.99
     z_2                        = (zMax-zMin)/2.0 + zMin
     num_seeds                  = nSeeds**2.0
     line_thickness             = thin
     color_type                 = contour
     contour_function           = "velocity_magnitude"
     legend_display             = on
     legend_subtitle            = "_none"
     vector_function            = "velocity"
     num_labels                 = 2
     legend_use_local           = off
     legend_min                 = .6*meanVel
     legend_max                 = 2.5*meanVel
     display_type               = complete
}