elongated mesh

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erwin
Posts: 3
Joined: Mon Aug 12, 2019 7:43 am
Location: Germany

elongated mesh

Post by erwin » Mon Aug 12, 2019 11:46 am

Hi,

I am just new to HYDRUS 2D. I am generating my mesh for a coastal peatland with an artificial sand dune along the coast. I am making a vertical transect from the peatland to the beach. The sand dune height is about 4 m and the peatland is probably at 0.5 m. For my mesh, my TS is 0.75 m and stretching is Fs = 3. The whole transect extends from x=-1000m to x=468m. The sea level is at 0,0. Whenever I generate my mesh, I always get this elongated triangular finite elements. I tried to use a stretching factor of 4 to no avail. Can somebody enlighten me how to make a better mesh? I have attached an image of my mesh.

Thanks,
erwin
Attachments
mesh.PNG
mesh.PNG (724.89 KiB) Viewed 32 times

Mirek
Posts: 408
Joined: Sat Mar 16, 2002 4:00 pm
Location: Czech Republic
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Re: elongated mesh

Post by Mirek » Mon Aug 12, 2019 12:14 pm

You probably have view-stretching turned on - can you check it?
M.

erwin
Posts: 3
Joined: Mon Aug 12, 2019 7:43 am
Location: Germany

Re: elongated mesh

Post by erwin » Mon Aug 12, 2019 1:18 pm

Mirek wrote:
Mon Aug 12, 2019 12:14 pm
You probably have view-stretching turned on - can you check it?
M.
I have not checked it. Does the narrow height of the sand dune affect the generated mesh?

Thanks,
Erwin
Attachments
stretching.PNG
stretching.PNG (78.37 KiB) Viewed 26 times

Mirek
Posts: 408
Joined: Sat Mar 16, 2002 4:00 pm
Location: Czech Republic
Contact:

Re: elongated mesh

Post by Mirek » Mon Aug 12, 2019 1:24 pm

Mesh is OK, just the View is probably stretched. Set view stretching factors to 1 (main menu -> View -> View Stretching...).

erwin
Posts: 3
Joined: Mon Aug 12, 2019 7:43 am
Location: Germany

Re: elongated mesh

Post by erwin » Mon Aug 12, 2019 1:38 pm

Great! Thanks for the clarification!

Erwin

Jirka
Posts: 4726
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Re: elongated mesh

Post by Jirka » Mon Aug 12, 2019 2:06 pm

If you are new to HYDRUS, you should read about rules on spatial and temporal discretization (FAQ 8):
http://www.pc-progress.com/Documents/No ... zation.pdf

J.

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