delta.h

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#pragma once
 
#include <functional>
#include <vector>
 
#include <petscsys.h>
 
namespace petibm
{
namespace delta
{
PetscReal Roma_et_al_1999(const PetscReal &r, const PetscReal &dr);
 
PetscReal Peskin_2002(const PetscReal &r, const PetscReal &dr);
 
typedef std::function<PetscReal(const PetscReal &r,
                                const PetscReal &dr)> DeltaKernel;
 
PetscErrorCode getKernel(const std::string &name,
                         DeltaKernel &kernel, PetscInt &size);
 
PetscReal delta(const std::vector<PetscReal> &source,
                const std::vector<PetscReal> &target,
                const std::vector<PetscReal> &widths,
                const DeltaKernel &kernel);
 
}  // end of namespace delta
 
}  // end of namespace petibm