38 template<
class Mu,
class SH,
class TC>
42 _stab_helper( physics_name+
"StabHelper", input )
47 template<
class Mu,
class SH,
class TC>
53 template<
class Mu,
class SH,
class TC>
60 context.get_element_fe(this->_p_var)->get_dphi();
63 context.get_element_fe(this->_u_var)->get_d2phi();
64 context.get_element_fe(this->_T_var)->get_d2phi();
69 template<
class Mu,
class SH,
class TC>
71 unsigned int qp )
const
73 libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
74 libMesh::RealGradient grad_T = context.fixed_interior_gradient(this->_T_var, qp);
76 libMesh::RealGradient U( context.fixed_interior_value(this->_u_var, qp),
77 context.fixed_interior_value(this->_v_var, qp) );
79 libMesh::RealGradient grad_u, grad_v;
81 grad_u = context.fixed_interior_gradient(this->_u_var, qp);
82 grad_v = context.fixed_interior_gradient(this->_v_var, qp);
84 libMesh::Real divU = grad_u(0) + grad_v(1);
88 U(2) = context.fixed_interior_value(this->_w_var, qp);
89 divU += (context.fixed_interior_gradient(this->_w_var, qp))(2);
92 return divU - (U*grad_T)/T;
95 template<
class Mu,
class SH,
class TC>
97 unsigned int qp )
const
99 libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
100 libMesh::Real T_dot = context.interior_value(this->_T_var, qp);
102 libMesh::Real RC_t = -T_dot/T;
104 if( this->_enable_thermo_press_calc )
106 libMesh::Real p0 = context.fixed_interior_value(this->_p0_var, qp);
107 libMesh::Real p0_dot = context.interior_value(this->_p0_var, qp);
115 template<
class Mu,
class SH,
class TC>
117 unsigned int qp )
const
119 libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
121 libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );
123 libMesh::RealGradient U( context.fixed_interior_value(this->_u_var, qp),
124 context.fixed_interior_value(this->_v_var, qp) );
126 U(2) = context.fixed_interior_value(this->_w_var, qp);
128 libMesh::RealGradient grad_p = context.fixed_interior_gradient(this->_p_var, qp);
130 libMesh::RealGradient grad_u = context.fixed_interior_gradient(this->_u_var, qp);
131 libMesh::RealGradient grad_v = context.fixed_interior_gradient(this->_v_var, qp);
133 libMesh::RealTensor hess_u = context.fixed_interior_hessian(this->_u_var, qp);
134 libMesh::RealTensor hess_v = context.fixed_interior_hessian(this->_v_var, qp);
136 libMesh::RealGradient rhoUdotGradU;
137 libMesh::RealGradient divGradU;
138 libMesh::RealGradient divGradUT;
139 libMesh::RealGradient divdivU;
143 rhoUdotGradU = rho*_stab_helper.UdotGradU( U, grad_u, grad_v );
144 divGradU = _stab_helper.div_GradU( hess_u, hess_v );
145 divGradUT = _stab_helper.div_GradU_T( hess_u, hess_v );
146 divdivU = _stab_helper.div_divU_I( hess_u, hess_v );
150 libMesh::RealGradient grad_w = context.fixed_interior_gradient(this->_w_var, qp);
151 libMesh::RealTensor hess_w = context.fixed_interior_hessian(this->_w_var, qp);
153 rhoUdotGradU = rho*_stab_helper.UdotGradU( U, grad_u, grad_v, grad_w );
155 divGradU = _stab_helper.div_GradU( hess_u, hess_v, hess_w );
156 divGradUT = _stab_helper.div_GradU_T( hess_u, hess_v, hess_w );
157 divdivU = _stab_helper.div_divU_I( hess_u, hess_v, hess_w );
160 libMesh::RealGradient divT = this->_mu(T)*(divGradU + divGradUT - 2.0/3.0*divdivU);
162 if( this->_mu.deriv(T) != 0.0 )
164 libMesh::Gradient grad_T = context.fixed_interior_gradient(this->_T_var, qp);
166 libMesh::Gradient grad_u = context.fixed_interior_gradient(this->_u_var, qp);
167 libMesh::Gradient grad_v = context.fixed_interior_gradient(this->_v_var, qp);
169 libMesh::Gradient gradTgradu( grad_T*grad_u, grad_T*grad_v );
171 libMesh::Gradient gradTgraduT( grad_T(0)*grad_u(0) + grad_T(1)*grad_u(1),
172 grad_T(0)*grad_v(0) + grad_T(1)*grad_v(1) );
174 libMesh::Real divU = grad_u(0) + grad_v(1);
176 libMesh::Gradient gradTdivU( grad_T(0)*divU, grad_T(1)*divU );
180 libMesh::Gradient grad_w = context.fixed_interior_gradient(this->_w_var, qp);
182 gradTgradu(2) = grad_T*grad_w;
184 gradTgraduT(0) += grad_T(2)*grad_u(2);
185 gradTgraduT(1) += grad_T(2)*grad_v(2);
186 gradTgraduT(2) = grad_T(0)*grad_w(0) + grad_T(1)*grad_w(1) + grad_T(2)*grad_w(2);
189 gradTdivU(0) += grad_T(0)*grad_w(2);
190 gradTdivU(1) += grad_T(1)*grad_w(2);
191 gradTdivU(2) += grad_T(2)*divU;
194 divT += this->_mu.deriv(T)*( gradTgradu + gradTgraduT - 2.0/3.0*gradTdivU );
197 libMesh::RealGradient rhog( rho*this->_g(0), rho*this->_g(1) );
199 rhog(2) = rho*this->_g(2);
201 return rhoUdotGradU + grad_p - divT - rhog;
204 template<
class Mu,
class SH,
class TC>
206 unsigned int qp )
const
208 libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
209 libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );
211 libMesh::RealGradient u_dot( context.interior_value(this->_u_var, qp), context.interior_value(this->_v_var, qp) );
214 u_dot(2) = context.interior_value(this->_w_var, qp);
219 template<
class Mu,
class SH,
class TC>
221 unsigned int qp )
const
223 libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
224 libMesh::Gradient grad_T = context.fixed_interior_gradient(this->_T_var, qp);
225 libMesh::Tensor hess_T = context.fixed_interior_hessian(this->_T_var, qp);
227 libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );
228 libMesh::Real rho_cp = rho*this->_cp(T);
230 libMesh::RealGradient rhocpU( rho_cp*context.fixed_interior_value(this->_u_var, qp),
231 rho_cp*context.fixed_interior_value(this->_v_var, qp) );
233 rhocpU(2) = rho_cp*context.fixed_interior_value(this->_w_var, qp);
235 libMesh::Real hess_term = hess_T(0,0) + hess_T(1,1);
237 hess_term += hess_T(2,2);
240 return rhocpU*grad_T - this->_k.deriv(T)*(grad_T*grad_T) - this->_k(T)*(hess_term);
244 template<
class Mu,
class SH,
class TC>
246 unsigned int qp )
const
248 libMesh::Real T = context.fixed_interior_value(this->_T_var, qp);
249 libMesh::Real rho = this->rho(T, this->get_p0_transient(context,qp) );
250 libMesh::Real rho_cp = rho*this->_cp(T);
251 libMesh::Real T_dot = context.interior_value(this->_T_var, qp);
253 libMesh::Real RE_t = rho_cp*T_dot;
255 if( this->_enable_thermo_press_calc )
257 RE_t -= context.interior_value(this->_p0_var, qp);
libMesh::RealGradient compute_res_momentum_transient(AssemblyContext &context, unsigned int qp) const
libMesh::Real compute_res_energy_steady(AssemblyContext &context, unsigned int qp) const
Adds VMS-based stabilization to LowMachNavierStokes physics class.
virtual ~LowMachNavierStokesStabilizationBase()
libMesh::Real compute_res_energy_transient(AssemblyContext &context, unsigned int qp) const
Physics class for Incompressible Navier-Stokes.
virtual void init_context(AssemblyContext &context)
Initialize context for added physics variables.
virtual void init_context(AssemblyContext &context)
Initialize context for added physics variables.
libMesh::RealGradient compute_res_momentum_steady(AssemblyContext &context, unsigned int qp) const
libMesh::Real compute_res_continuity_steady(AssemblyContext &context, unsigned int qp) const
libMesh::Real compute_res_continuity_transient(AssemblyContext &context, unsigned int qp) const
LowMachNavierStokesStabilizationBase()