SMS:FESWMS Material Properties: Difference between revisions

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Material properties include roughness, turbulence, and wind/wave parameters.
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{{SMS Deprecated Feature}}
FESWMS material properties include roughness, turbulence, and wind/wave parameters. The ''Materials Properties'' dialog is accessed through the [[SMS:FESWMS Menu|''FESWMS'' menu]].


=== Roughness Parameters ===
=== Roughness Parameters ===
[[Image:FESWMS MP Roughness.jpg|thumb|450 px|''FESWMS Material Properties'' dialog showing the ''Roughness Parameters'' tab]]
The roughness helps determine the energy losses as water flows over elements.  Each material includes roughness information.
The roughness helps determine the energy losses as water flows over elements.  Each material includes roughness information.
* Manning n values (n1, n2, depth1, depth2)
* Manning ''n'' values (''n1'', ''n2'', ''Depth 1'', ''Depth 2'')
The primary roughness property is the manning n value associated with the element.  The manning n value can vary with depth by specifying n values at two depths.  The n1 value is used below depth1.  The n2 value is used above depth2.  Between depth1 and depth2 the n value is linearly interpolated.
*:The primary roughness property is the manning ''n'' value associated with the element.  The manning ''n'' value can vary with depth by specifying ''n'' values at two depths.  The n1 value is used below depth1.  The n2 value is used above depth2.  Between depth 1 and depth 2 the ''n'' value is linearly interpolated.
* ''Wall roughness''
*:The wall roughness is used on the edge of the model domain.  Wall roughness is ignored unless the model is using semi-slip boundaries.
* ''Soil Liners''
*:FESWMS can be used with materials representing a soil liner.  To use a liner, turn on the linear critical shear stress and set the value.  When using a liner n1, n2, depth1, and depth2 are ignored.
* ''Pressure flow''
*:It is required to toggle on "potential pressure flow" with all materials that are assigned to elements with a ceiling elevation.  If pressure flow is enabled, the deck roughness is the manning value for the bridge deck.  Otherwise deck roughness is ignored.
* ''Chezy''
*:Chezy values are an alternative to using Manning n values for roughness.  It's necessary to turn on chezy in the model parameters to use this value.
* ''Bed critical shear stress''
*:The bed critical shear stress is used to compute clear water scour.


* Wall roughness
=== Turbulence Parameters ===
The wall roughness is used on the edge of the model domain. Wall roughness is ignored unless the model is using semi-slip boundaries.
[[Image:FESWMS MP Turbulence.jpg|thumb|450 px|''FESWMS Material Properties'' dialog showing the ''Turbulence Parameters'' tab]]
Turbulence parameters are used to control the energy lost in turbulence.
* ''Vo ''
*: Base eddy viscosity in length^2/second.
*'' Cu1'', ''Cu2 ''
*:Turbulence model coefficients used to modify base eddy viscosity.
* ''Eddy diffusivity ''
*: Used to modify base eddy viscosity and is related to the amount of curves in the channel.
* ''Storativity depth ''
*:The global storativity depth (specified in the model parameters) can be overriden on a material level by entering a non-zero value.


* Soil Liners
===Wind/Wave Parameters===
FESWMS can be used with materials representing a soil liner.  To use a liner, turn on the linear critical shear stress and set the value.  When using a liner n1, n2, depth1, and depth2 are ignored.
* ''Wind Shear Reduction Factor''
*'' Water Wave Height''
* ''Wave Period''


* Pressure flow
[[Image:FESWMS MP Wind.jpg|thumb|none|left|450 px|''FESWMS Material Properties'' dialog showing the Wind/Wave Parameters'' tab]]
It is required to toggle on "potential pressure flow" with all materials that are assigned to elements with a ceiling elevation. If pressure flow is enabled, the deck roughness is the manning value for the bridge deck.  Otherwise deck roughness is ignored.


* Chezy
==Related Topics==
Chezy values are an alternative to using Manning n values for roughness.  You must turn on chezy in the model parameters to use this value.
* [[SMS:FESWMS Menu|FESWMS Menu]]


* Bed critical shear stress
The bed critical shear stress is used to compute clear water scour.
=== Turbulence Parameters ===
Turbulence parameters are used to control the energy lost in turbulence.
* Vo – Base eddy viscosity in Length^2/second
* Cu1, Cu2 – Turbulence model coefficients used to modify base eddy viscosity
* Eddy diffusivity – used to modify base eddy viscosity and is related to the amount of curves in the channel
* Storativity depth – The global storativity depth (specified in the model parameters) can be overriden on a material level by entering a non-zero value.
===Wind/Wave Parameters===


{{Template:Navbox SMS}}
{{Template:Navbox SMS}}
[[Category:FESWMS|M]]
[[Category:FESWMS Dialogs|mat]]
[[Category:SMS Materials|F]]
[[Category:Archived]]

Latest revision as of 14:19, 10 June 2019

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FESWMS material properties include roughness, turbulence, and wind/wave parameters. The Materials Properties dialog is accessed through the FESWMS menu.

Roughness Parameters

FESWMS Material Properties dialog showing the Roughness Parameters tab

The roughness helps determine the energy losses as water flows over elements. Each material includes roughness information.

  • Manning n values (n1, n2, Depth 1, Depth 2)
    The primary roughness property is the manning n value associated with the element. The manning n value can vary with depth by specifying n values at two depths. The n1 value is used below depth1. The n2 value is used above depth2. Between depth 1 and depth 2 the n value is linearly interpolated.
  • Wall roughness
    The wall roughness is used on the edge of the model domain. Wall roughness is ignored unless the model is using semi-slip boundaries.
  • Soil Liners
    FESWMS can be used with materials representing a soil liner. To use a liner, turn on the linear critical shear stress and set the value. When using a liner n1, n2, depth1, and depth2 are ignored.
  • Pressure flow
    It is required to toggle on "potential pressure flow" with all materials that are assigned to elements with a ceiling elevation. If pressure flow is enabled, the deck roughness is the manning value for the bridge deck. Otherwise deck roughness is ignored.
  • Chezy
    Chezy values are an alternative to using Manning n values for roughness. It's necessary to turn on chezy in the model parameters to use this value.
  • Bed critical shear stress
    The bed critical shear stress is used to compute clear water scour.

Turbulence Parameters

FESWMS Material Properties dialog showing the Turbulence Parameters tab

Turbulence parameters are used to control the energy lost in turbulence.

  • Vo
    Base eddy viscosity in length^2/second.
  • Cu1, Cu2
    Turbulence model coefficients used to modify base eddy viscosity.
  • Eddy diffusivity
    Used to modify base eddy viscosity and is related to the amount of curves in the channel.
  • Storativity depth
    The global storativity depth (specified in the model parameters) can be overriden on a material level by entering a non-zero value.

Wind/Wave Parameters

  • Wind Shear Reduction Factor
  • Water Wave Height
  • Wave Period
FESWMS Material Properties dialog showing the Wind/Wave Parameters tab

Related Topics


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