NSImposedVelocityBC.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#pragma once
 
// The base class definition (part of MOOSE)
#include "NodalBC.h"
 
// Forward Declarations
 
// Specialization required of all user-level Moose objects
 
class NSImposedVelocityBC : public NodalBC
{
public:
  static InputParameters validParams();
 
  NSImposedVelocityBC(const InputParameters & parameters);
 
protected:
  // NodalBC's can (currently) only override the computeQpResidual function,
  // the computeQpJacobian() function automatically assembles a "1" onto the main
  // diagonal for this DoF.
  virtual Real computeQpResidual();
 
  // We need the density, since we are actually setting essential values of
  // *momentum* not essential values of velocity.
  const VariableValue & _rho;
 
  // The desired value for the velocity component
  Real _desired_velocity;
};