tfluid.c: add comment on underrelaxation parameter - cngf-pf - continuum model for granular flows with pore-pressure dynamics (renamed from 1d_fd_simple_shear)
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       ---
 (DIR) commit 98e82ec48621114493aa95f533f2a82c56581739
 (DIR) parent cd1860a031d74199c9308ee12bee5dea8572f7be
 (HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
       Date:   Tue,  9 Mar 2021 15:24:14 +0100
       
       fluid.c: add comment on underrelaxation parameter
       
       Diffstat:
         M fluid.c                             |       4 ++++
       
       1 file changed, 4 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/fluid.c b/fluid.c
       t@@ -179,6 +179,9 @@ darcy_solver_1d(struct simulation *sim,
                 * epsilon = 0.5: Crank-Nicolson
                 * epsilon = 1.0: implicit */
                epsilon = 0.5;
       +
       +        /* underrelaxation parameter in ]0.0; 1.0],
       +         * where omega = 1.0: no underrelaxation */
                omega = 1e-4;
        
                for (i = 0; i < sim->nz; ++i)
       t@@ -301,6 +304,7 @@ darcy_solver_1d(struct simulation *sim,
                                          + (1.0 - epsilon) * sim->p_f_dot_expl[i];
        
                set_fluid_bcs(sim->p_f_ghost, sim, p_f_top);
       +
                for (i = 0; i < sim->nz; ++i)
                            sim->p_f_dot[i] = omega * sim->p_f_dot[i]
                                              + (1.0 - omega) * sim->p_f_dot_old[i];