CSTMS SEDTOY

SED_TOY Test Case

Brief Description of Model Test Case.

File:sed toy 1.gif

Domain

Brief Description of Model Grid.

This 1D model utilizes multiple sediment classes to illustrate sediment distribution and concentration during steady-state conditions, with 21 timesteps. In this test run of Sed_Toy, two cohesive sediment grain size classes are input into the model (0.01mm and 0.005mm). The .01mm sediment class begins on/within the sediment bed at the start of the model; whereas the .005mm grains are found only in the water column. As the model progresses sediment grains settle and/or become suspended, thereby ending with a mixed grained sediment bed at the end of the model run. Sediment concentration profiles can be extracted throughout the time frame for model result comparisons.

Model Parameter	Variable	Value
Length (east-west)	1/Pm	10
Width (north-south)	1/Pn	10
Depth	h

Bottom Sediment

Size	D50	0.01 mm	0.005mm
Density	ρs	2650 kg/m3	2400 kg/m3
Settling Velocity	ws	0.1 mm/s	0.01 mm/s
Critical Shear Stress (Erosion)	τc	0.01 N/m2	0.01 N/m2
Critical Shear Stress (Deposition)	τc	0.1 N/m2	0.1 N/m2
Init Bed Thickness	bed_thick	0.01 mm	0.01 mm
Init Susp Concentraion	bed_thick	0 kg/m3	10 kg/m3
Erosion Rate	E0	5e-5 kg/m2/s	5e-5 kg/m2/s

|Porosity |align="center"|τ_c |0.3 |0.3 |-

Forcing

No Coriolis
No heating/cooling
No wind
No waves

Body Force:

<wikitex>Describe body force here</wikitex>

Steady State Conditions

<wikitex>$\textcolor{blue}{u} ~= ~XXX ~m/s^{2}$
$\textcolor{blue}{v} ~= ~XXX ~m/s^{2}$
Describe steady state sediment concentration and sediment bed </wikitex>

Boundary Conditions

<wikitex>Try to describe boundary conditions here wikitex>

Physical Constants

<wikitex>Gravitational acceleration $\textcolor{blue}{g}~ =~ 9.81~ ^{2}$
Von Karman's constant $\textcolor{blue}{\kappa}~ =~ 0.41$
Dynamic viscosity (and minimum diffusivity) $\textcolor{blue}{\nu}~= 1e-6 m^{2}/s$</wikitex>

Note: If a model incorporates physical constants that differ from these, and/or automatically calculates some values specified here, please specify the values used.

Results

Figure 1. Model bathymetry.

Describe model output that the user should expect to see here. Include one or two figures.