Hello,
I was wondering if I could get a more detailed explanation than is given in the solver manual of how to properly set the parameters of the moveable be computations in the Mflow_02 solver. Specifically:
– How is the relative weight of bedload material calculated?
– What is the void ratio of the bed material? I see formulas online that give void ratio as, e=V_void/V_total. So is the proper interpretation of this parameter as the degree of soil compaction? How is this parameter utilized in the computations?
-Also, I am not sure what the morphological factor and the secondary flow coefficient and do not see a reference to these in the solver manual.
Thanks
コメント
Hello,
We will answer some questions. All are input data, but please refer to the following.
The relative weight of bedload material is calculated by s = (σ⁄ρ-1).
ρ: Water density
σ: Gravel density (≅2.65)
The void ratio of the bed material is typically 25-30%. For details, refer to the survey results of each analysis target area.
The secondary flow coefficient is generally around 7.
For more information
“Engelund, F .: Flow and Bed Topography in Channel Bend, Jour.of Hydr.Div., ASCE, Vol.100. HY11, pp.1631-1648, 1974.”
Please refer to.