A_bed A_surface aspect_schoof B_bed B_schoof blatter_coarsening_hook blatter_restriction_hook C_bed C_surface compute_2D_principal_strain_rates compute_2D_stresses copy_staggered_vec create D2 disable_ew enable_ew H0_schoof H_exact ISMIPHOMTest L_schoof m_schoof set_diagonal_matrix_entry SSAFactory SSAFD_RegionalFactory SSAFDFactory SSAFEMFactory u_exact u_exterior weight weight zero_above_ice

D2() static double pism::stressbalance::D2 ( double  u_x, double  u_y, double  u_z, double  v_x, double  v_y, double  v_z  ) inlinestatic This function computes \(D^2\) defined by \[ 2D^2 = D_{ij} D_{ij}\] or \[ D^2 = \frac{1}{2}\,\left(\frac{1}{2}\,(v_{z})^2 + (v_{y} + u_{x})^2 + (v_{y})^2 + \frac{1}{2}\,(v_{x} + u_{y})^2 + \frac{1}{2}\,(u_{z})^2 + (u_{x})^2\right) \] (note the use of the summation convention). Here \(D_{ij}\) is the strain rate tensor. See StressBalance::compute_volumetric_strain_heating() for details. Parameters u_x,u_y,u_z partial derivatives of \(u\), the x-component of the ice velocity v_x,v_y,v_z partial derivatives of \(v\), the y-component of the ice velocity Returns \(D^2\), where \(D\) is defined above. Definition at line 440 of file StressBalance.cc. Referenced by pism::Time::calendar_year_start(), pism::stressbalance::StressBalance::compute_volumetric_strain_heating(), and pism::Time::year_fraction().