TUFLOW Message 3027: Difference between revisions
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|suggestions=Ensure that all materials that utilise log-law roughness have positive values for mannings n. |
|suggestions=Ensure that all materials that utilise log-law roughness have positive values for mannings n. |
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|prelink=[[TUFLOW_Message_3026|Message 3026]] |
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|uplink=[[3xxx_TUFLOW_Messages|3xxx Messages]] |
|uplink=[[3xxx_TUFLOW_Messages|3xxx Messages]] |
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|nextlink=[[TUFLOW_Message_3028|Message 3028]] |
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Latest revision as of 10:15, 3 March 2023
TUFLOW Message
ERROR 3027 - Roughness height specified but nLim less than 0.
Alternate Message
NA
Message Type
ERROR
Description
Materials may use use either fixed mannings, depth-varying mannings, or log-law roughness formulations for bed resistance.
When utilising log-law roughness, a maximum limit for equivalent mannings number is required as the formulation becomes singular at shallow depths.
This limit, provided as the fixed mannings n value in the material data, must be greater than zero.
Suggestions
Ensure that all materials that utilise log-law roughness have positive values for mannings n.
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