Feature/QCriterion2D
Currently, the Q Criterion is only implemented for 3D and 3DH1D Incompressible flow. Sometimes, I need the Q in a 2D flow. This MR adds Q Criterion for the 2D incompressible field. No document needs to be update.
Currently, the Q Criterion is only implemented for 3D and 3DH1D Incompressible flow. Sometimes, I need the Q in a 2D flow. This MR adds Q Criterion for the 2D incompressible field. No document needs to be update.