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	tfluid.c: add comment on underrelaxation parameter - cngf-pf - continuum model …
	git clone git://src.adamsgaard.dk/cngf-pf
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	---
	commit 98e82ec48621114493aa95f533f2a82c56581739
	parent cd1860a031d74199c9308ee12bee5dea8572f7be
	Author: Anders Damsgaard <[email protected]>
	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
	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];