stretching_deformation# rojak.turbulence.calculations.stretching_deformation(du_dx: DataArray, dv_dy: DataArray) → DataArray[source]# Stretch deformation \[D_{\text{st}} = \frac{ \partial u }{ \partial x } - \frac{ \partial v }{ \partial y }\] Parameters: du_dx (DataArray) – Array containing values for \(\frac{ \partial u }{ \partial x }\) dv_dy (DataArray) – Array containing values for \(\frac{ \partial v }{ \partial y }\) Return type: DataArray