MoT-Voellmy/input_template_Voellmy_2026-04-20.rcf at main · norwegian-geotechnical-institute/MoT-Voellmy · GitHub

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# Run information
#
MoT-Voellmy input file version          2026-04-20
Area of Interest                        Flateyri
UTM zone                                33N
EPSG geodetic datum code                25833
Run name                                Flateyri RA 2, Run 2
#
# File names
#
Grid filename                           /data/Models/MoT-Voellmy/Tests/Flateyri/RA0002_dem.asc
Release depth filename                  /data/Models/MoT-Voellmy/Tests/Flateyri/RA0002_nf_h.asc
Bed depth filename                      -
Bed shear strength filename             -
Forest density filename                 -
Tree diameter filename                  -
Start velocity u filename               -
Start velocity v filename               -
Output filename root                    /data/Models/MoT-Voellmy/Tests/Flateyri/Run_02/02
Output format                           ESRI_ASCII_Grid
#
# Physical parameters
#
Gravitational acceleration   (m/s^2)    9.81
Flow density                (kg/m^3)    250.0
Bed density                 (kg/m^3)    140.0
Deposit density             (kg/m^3)    450.0
Rheology                                Voellmy
Parameters                              constant
Dry-friction coefficient         (-)    0.40
Turbulent drag coefficient       (-)    0.001
Effective drag height            (m)    3.0
Centrifugal effects                     no
Passive earth-pressure coeff.    (-)    1.0
#
Forest effects                          no
Tree drag coefficient            (-)    1.0
Modulus of rupture             (MPa)    50.0
Forest decay coefficient       (m/s)    0.15
#
Entrainment                             none
Erosion coefficient              (-)    0.0
Bed strength profile                    global
Bed friction coefficient         (-)    0.25
Deposition                              no
Evolving geometry                       no
#
# Numerical parameters
#
Simulation time                  (s)    200.0
Minimum time step                (s)    0.001
Maximum time step                (s)    0.2
Output interval                  (s)    1.0
Write velocity vectors                  no
Write maximum pressure                  yes
Write instant. pressure                 no
Minimum flow depth               (m)    0.01
Minimum speed                  (m/s)    0.01
Minimum momentum fraction        (%)    1.0
Initial CFL number               (-)    0.8