cngf-pf

commit 98e82ec48621114493aa95f533f2a82c56581739
parent cd1860a031d74199c9308ee12bee5dea8572f7be
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(-)
diff --git a/fluid.c b/fluid.c
@@ -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)
@@ -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];