Line data    Source code

       1            0 : // Distributed under the MIT License.
       2              : // See LICENSE.txt for details.
       3              : 
       4              : #pragma once
       5              : 
       6              : #include "Utilities/Gsl.hpp"
       7              : 
       8              : /// \cond
       9              : class Matrix;
      10              : template <size_t>
      11              : class Mesh;
      12              : template <typename TagsList>
      13              : class Variables;
      14              : /// \endcond
      15              : 
      16              : namespace Spectral::filtering {
      17              : /*!
      18              :  * \brief Filters the tensors stored within a `Variables` being represented by
      19              :  * ZernikeB1 basis functions in their first dimension.
      20              :  *
      21              :  * \details The Cartoon method with spectral bases can be unstable for small
      22              :  * \f$x\f$, so we use ZernikeB1 bases with GaussRadauUpper quadrature to push
      23              :  * collocation points to higher inertial coordinates. This basis has
      24              :  * parity-dependent spectral space, so we must go to the proper modal space,
      25              :  * apply the exponential filter, and transform back.
      26              :  *
      27              :  * \see exponential_filter()
      28              :  */
      29              : template <typename VariablesTags>
      30            1 : void zernike_b1_exponential_filter(gsl::not_null<Variables<VariablesTags>*> u,
      31              :                                    const Mesh<3>& mesh, double alpha,
      32              :                                    unsigned half_power);
      33              : }  // namespace Spectral::filtering