classes.py

class VelocityField

class classes.VelocityField(file_path='/', time_step=0, mean_file_path='/', file_type='/')

Bases: object

Data file

Loads the input file with the NetCFD (.nc) format or a Tecplot format (.dat); initialize the variables.

Parameters:

• file_path (str) – file path
• time_step (int) – current time step
• mean_file_path (str) – in case of a mean field subtraction
• file_type (str) – ‘piv_netcdf’, ‘dns, ‘dns2’, ‘piv_tecplot’, ‘openfoam’
• x_coordinate_matrix (ndarray) – spatial mesh
• y_coordinate_matrix (ndarray) – spatial mesh
• z_coordinate_matrix (ndarray) – spatial mesh, optional
• u_velocity_matrix (ndarray) – 1st component velocity field
• v_velocity_matrix (ndarray) – 2nd component velocity field
• w_velocity_matrix (ndarray) – 3rd component velocity field, optional
• normalization_flag (boolean) – for normalization of the swirling field
• normalization_direction (str) – ‘None’, ‘x’ or ‘y’
• x_coordinate_step (float) – for homogeneous mesh, provides a unique step
• y_coordinate_step (float) – for homogeneous mesh, provides a unique step
• z_coordinate_step (float) – for homogeneous mesh, provides a unique step
• derivative (dict) – contains ‘dudx’, ‘dudy’, ‘dvdx’, ‘dvdy’. Can be extended to the 3rd dimension

Returns:

vfield, an instance of the VelocityField class

Return type:

class VelocityField