Power of HECRAS 5

[Michaeltay]

Using 2D MESH to model flow across skew bridge In HECRAS 5
https://www.youtube.com/watch?v=7KZaOB3tB0k

[Chris G.]

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Sat, 29 Aug 2015 09:37:56 -0700 (PDT)
Subject: Re: Power of HECRAS 5
References: <[email protected]>
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That’s cool. Can I post it on The RAS Solution? If so, can you give me some=
details? Eg. Cell Size, time step, simulation time, diffusion wave or full=
momentum, etc. thanks
Chris

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> On Aug 29, 2015, at 08:56, Michaeltay [via HEC-RAS Help] wrote:
>=20
> Using 2D MESH to model flow across skew bridge In HECRAS 5=20
> https://www.youtube.com/watch?v=3D7KZaOB3tB0k=20
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That’s cool. Can I post it on The RAS Solution?  If so, can you give me some details?  Eg. Cell Size, time step, simulation time, diffusion wave or full momentum, etc. thanks

Chris

Sent from my iPhone

On Aug 29, 2015, at 08:56, Michaeltay [via HEC-RAS Help] <[email protected]> wrote:

Using 2D MESH to model flow across skew bridge In HECRAS 5

https://www.youtube.com/watch?v=7KZaOB3tB0k

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If you reply to this email, your message will be added to the discussion below:

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[Michaeltay]

1mx1m cell size, time step of 30 second using full momentum. Sure you could post it. I have posted a version of normal crossing and a version with downstream tidal effect.

[Anonymous]

how to import .2dm file in Hec ras 5

[cameron]

You can’t import a 2dm file into HEC-RAS 5.0 that I am aware of. Most 2dm files are triangular meshes and HEC-RAS does something different when meshing. Also one of the advantages of HEC-RAS 5.0 is you don’t need as small as elements as other 2D models.

[Runoff]

Cameron is right, .2dm files typically contain triangular or quadrilateral elements, however, using the SMS software developed by Aquaveo, you can convert .2dm files to the RAS geometry format and load that into RAS 5.0. It works well and does preserve the triangular or quadrilateral cell configuration, you just have to be careful not to make any changes to the “2D flow areas” options after importing it into RAS, as RAS will regenerate the mesh and build a different configuration of cell edges.

[Author]

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