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TOPIC: Laboratory Flume Mesh with Hydraulic Model

Laboratory Flume Mesh with Hydraulic Model 11 years 1 week ago #10954

  • amanj2013
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Hi everyone!

I am new in BlueKenue as well in Telemac too. I tried to create a mesh for lab flume included a model for embankment impose to overflowing, but indeed I got confuse about mesh type:
First of all, is it necessary to have different mesh for running SISYPHE + Telemac? In my case, I have a channel which is solid boundary ( L=30m, W=0.70, H=0.60m) while I have a model of embankment installed inside this flume for erosion test means the embankment is overflowing and erosion will occur because its non-cohesive sand material, so Can I make different mesh according to the surface material?
Herein after is the sample of what I did in Bluekenue!
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Laboratory Flume Mesh with Hydraulic Model 11 years 1 week ago #10958

  • jmhervouet
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Hello,

When you couple Telemac and Sisyphe, you do need to have the same mesh for both, as they will exchange data on bed elevation, velocities and depth on the points of this mesh. Both programmes ask for a geometry file but this is only due to the fact that they can also work in standalone mode, and actually this geometry file must be the same.

Regards,

JMH
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Laboratory Flume Mesh with Hydraulic Model 11 years 1 week ago #10969

  • amanj2013
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Thanks dear JMH,

Infact I understood this technique for using mesh by both sisyphe and telemac, but I have problem with defining the function of mesh at different conditions. In my case, I have a flume which is solid and must not change the bathymetry (topography) at all situations whereas I have an embankment with specific properties which is sand and its face to erosion due to overflowing, so how and where I have to define the properties of this two different regions? during the preparing the mesh or should I define their properties inside the steering file or FORTRAN files of sisyphe?

Kind Regards
AMANJ
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Laboratory Flume Mesh with Hydraulic Model 11 years 1 week ago #10970

  • jmhervouet
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Hello,

Sand is part of the bottom and you may have dry zones, so I would say that you mesh the bare flume, and then you do the definition of the bottom topography at every point in the flume. If the sand is not flooded it will be a tidal flat, and then it can become flooded.

Regards,

JMH
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Laboratory Flume Mesh with Hydraulic Model 11 years 1 week ago #10972

  • amanj2013
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Hello,

Dear JMH, can i define different properties for different regions on the same mesh? for sure in my case I have dry and wet zone, at the initial condition, the upstream face of the embankment is fully saturated while the downstream is dry, after some times the overflowing occurs and then erosion will begin, this is my case. I means by different properties is that for the flume bed and wall is non erodible while the embankment itself is erodible material!

Regards
AMANJ
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Laboratory Flume Mesh with Hydraulic Model 11 years 1 week ago #10974

  • jmhervouet
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Hello,

The non erodible bed can be defined in Sisyphe in the subroutine noerod.f, in this way the flume will be preserved from erosion.

Regards,

JMH
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Laboratory Flume Mesh with Hydraulic Model 11 years 1 week ago #10975

  • amanj2013
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Hello,

Thanks a lot dear JMH,

I will try this way and then if I have an issue I will post!

Thnaks
AMANJ
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