Menu

Discussion Forum

New Discussion
查找

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Rainfall Infiltration Boundary Condition (COMSOL 4.0)

Posted 2011年3月20日 GMT-4 05:23 Version 4.0, Version 4.1 4 Replies

Charles Ly
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I am doing groundwater modeling which need to specify this boundary condition for the surface.
Here I have 1-year rainfall data, including precipitation rate and direct surface runoff in each hours.

In order to specify, I defined an interpolation function and imported hourly infiltration rate (text file) into it. However, because when it rains, water gradually accummulates at the surface and creates ponds (in my case, ponded height = 0.01 m). So the rainfall infiltration boundary conditions involve switching between Dirichlet and Neumann boundary conditions. I got stuck at this point, haven't found good way to define the boundary conditions.
Anyone can help me?
4 Replies Last Post 2011年11月17日 GMT-5 00:35
Charles Ly
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年3月20日 GMT-4 14:45
Oh, I've just tried out with the Pervious Layer boundary condition and Inward boundary condition to specify the rainfall infiltration at the surface. In particular, I defined an interpolation function to express the infiltration rate in every hours. Then I filled in the inflow velocity box (indise Inward Boundary condition) with the interpolation function created.
Is it the correct way? Waiting for your kind help. Thank you!
Oh, I've just tried out with the Pervious Layer boundary condition and Inward boundary condition to specify the rainfall infiltration at the surface. In particular, I defined an interpolation function to express the infiltration rate in every hours. Then I filled in the inflow velocity box (indise Inward Boundary condition) with the interpolation function created. Is it the correct way? Waiting for your kind help. Thank you!
Charles Ly
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年3月21日 GMT-4 11:03
Sorry to raise this topic again, but could someone help me? Thank you!
Sorry to raise this topic again, but could someone help me? Thank you!
Parikshit Verma
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年11月9日 GMT-5 01:00
Hi Charles!

I am also looking at the same problem! I dont know, but if i come accross i will post it.

thanks
Hi Charles! I am also looking at the same problem! I dont know, but if i come accross i will post it. thanks
Parikshit Verma
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年11月17日 GMT-5 00:35
hey i found this might be useful

www.stanford.edu/dept/cee/faculty/freyberg/ChuiFreyberg.pdf
hey i found this might be useful http://www.stanford.edu/dept/cee/faculty/freyberg/ChuiFreyberg.pdf

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content