Field3D.compute_strain_rate

Field3D.compute_strain_rate(self, save_derivatives=False, save_tensor=True, verbose=False):

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Description

Computes the strain rate or the derivatives of the velocity components (U, V, W) over a 3D mesh.

Parameters

• save_derivatives (bool, optional): If True, saves the derivatives of the velocity components as files in the main folder. Defaults to False.

• save_tensor (bool, optional): If True, saves the strain rate tensor as a file in the main folder. Defaults to True.

• verbose (bool, optional): If True, prints out progress information. Defaults to False.

Returns

None

Raises

• TypeError: If U, V, W are not instances of Scalar3D or if mesh is not an instance of Mesh3D.

• ValueError: If U, V, W and mesh do not have the same shape.

Workflow

1. Preprocess:

   • Sets the closure type based on the filter size.

   • Retrieves necessary attributes and initializes variables.

2. Compute Derivatives:

   • Computes derivatives of the velocity components in all three directions.

   • Saves derivatives as files if save_derivatives is True.

3. Compute Strain Rate Tensor:

   • Computes the strain rate tensor components by averaging appropriate velocity component derivatives.

   • Saves the strain rate tensor as a file if save_tensor is True.

Example

>>> field = Field3D('your_folder_path')
>>> field.compute_strain_rate(save_derivatives=True, save_tensor=True, verbose=True)