Search found 36 matches

by mGohar
Thu Jul 28, 2016 2:09 am
Forum: HYDRUS (2D/3D)
Topic: Sign of Cumulative Zero/first order Reaction
Replies: 1
Views: 2999

Sign of Cumulative Zero/first order Reaction

Hi, I have a simple question about the sign of "Cumulative Zero/first order Reaction": I am modeling ammonium and nitrate transport, considering the nitrification by means of first-order solute decay chain. What I get for "Cumulative first order Reaction" of ammonium is positive concentration and fo...
by mGohar
Fri Jul 01, 2016 7:38 am
Forum: HYDRUS (2D/3D)
Topic: Possibility of using ParSWMS
Replies: 2
Views: 3576

Re: Possibility of using ParSWMS

Thanks for your reply Jirka.
by mGohar
Tue Jun 28, 2016 9:05 pm
Forum: HYDRUS (2D/3D)
Topic: Possibility of using ParSWMS
Replies: 2
Views: 3576

Possibility of using ParSWMS

Hi, I am interested in modeling water and solute transport (specifically Nitrogen considering the first-order decay chain reaction, all in the liquid phase, and also Phosphorus). I was wondering whether or not it is possible to benefit from the ParSWMS to accelerate simulation run time? and does usi...
by mGohar
Fri Oct 02, 2015 6:58 am
Forum: HYDRUS (2D/3D)
Topic: Discrepency between applied and observed flux
Replies: 6
Views: 8889

Re: Discrepency between applied and observed flux

WOW! Thanks Jirka, it really helped me a lot!
by mGohar
Thu Oct 01, 2015 12:19 am
Forum: HYDRUS (2D/3D)
Topic: Discrepency between applied and observed flux
Replies: 6
Views: 8889

Re: Discrepency between applied and observed flux

Jirka,

I really appreciate your time for taking a look at my project!
I'm missing something basic then: the area associated with Irrigation. Having two circular area (with radius = 2.3 cm),
the way I calculate is: 2 * pi * (2.3)^2 = 33.238 cm2 .
where am I going wrong?

Mohammad
by mGohar
Wed Sep 30, 2015 12:25 pm
Forum: HYDRUS (2D/3D)
Topic: Discrepency between applied and observed flux
Replies: 6
Views: 8889

Re: Discrepency between applied and observed flux

Thanks Jirka, I've tried many variations with spatial discretization and at the end the difference decreased but still there is a significant one. The problem is my material is highly coarse (Ks=228 cm/hr) and hence the mesh sizes should be so small to handle this, then as a result the total number ...
by mGohar
Tue Sep 29, 2015 9:48 am
Forum: HYDRUS (2D/3D)
Topic: Discrepency between applied and observed flux
Replies: 6
Views: 8889

Discrepency between applied and observed flux

Hi, I have question about variable flux boundary and its cumulative value at the end of simulation. I'm simulating drip irrigation in 3D. The problem is that flux rate at variable flux boundary, the area of this region and the time interval of the applied flux are all known and hence the total volum...
by mGohar
Sun Sep 27, 2015 9:04 pm
Forum: HYDRUS (2D/3D)
Topic: drip irrigation in 3D and ponding
Replies: 2
Views: 4816

Re: drip irrigation in 3D and ponding

Thank you so much Dr. Jirka!
by mGohar
Wed Sep 23, 2015 8:26 am
Forum: HYDRUS (2D/3D)
Topic: drip irrigation in 3D and ponding
Replies: 2
Views: 4816

drip irrigation in 3D and ponding

Hello everyone, I am simulating a 3D drip irrigation in a 100 by 50 by 20 cm container. At the surface I specified atmospheric BC with small circles (r=2.3 cm) representing wetting area of drip emitters with variable flux 1 BC. First: is this the right way of simulation of drip irrigation? And is it...
by mGohar
Sun Sep 13, 2015 8:40 pm
Forum: HYDRUS (2D/3D)
Topic: Volume between two iso-surfaces
Replies: 1
Views: 3945

Volume between two iso-surfaces

Hi,

I'd like to know if it's possible to calculate the volume between two arbitrary iso-surfaces in Hydrus 3D?

Thanks,
Mohammad
by mGohar
Sun Sep 13, 2015 8:22 pm
Forum: HYDRUS (2D/3D)
Topic: Variable flux BC as evaporating BC
Replies: 6
Views: 6884

Re: Variable flux BC as evaporating BC

Thanks a lot for your help and time !
by mGohar
Sun Sep 13, 2015 6:21 am
Forum: HYDRUS (2D/3D)
Topic: Variable flux BC as evaporating BC
Replies: 6
Views: 6884

Re: Variable flux BC as evaporating BC

Thanks Dr. Jirka for your response! Actually I've enabled that option but still there are some sensible differences as the time increases (again just evaporation fluxes). Here please find the project file if you like to take a look at it: https://drive.google.com/file/d/0B467YcWSCzqoNXZDazltVU81R00/...
by mGohar
Fri Sep 11, 2015 2:52 am
Forum: HYDRUS (2D/3D)
Topic: Variable flux BC as evaporating BC
Replies: 6
Views: 6884

Variable flux BC as evaporating BC

Hi, I am simulating a drip irrigation in a 3D container. to account for drippers I've created a circle (2.3 cm in radius) around each dripper with the variable flux boundary condition. I'd like these areas participate in the evaporation process too, so when there is no irrigation, I set the flux to ...
by mGohar
Fri Aug 21, 2015 8:02 pm
Forum: HYDRUS (2D/3D)
Topic: Simulating drip irrigation in 3D
Replies: 2
Views: 4734

Re: Simulating drip irrigation in 3D

Jirka,

Thanks for responding while on your vacation. I'll work on it to see how to solve this problem.

Mohammad
by mGohar
Wed Aug 19, 2015 8:41 pm
Forum: HYDRUS (2D/3D)
Topic: Simulating drip irrigation in 3D
Replies: 2
Views: 4734

Simulating drip irrigation in 3D

Hello, I'm trying to simulate a 3D simple geometry pot with some drippers as the irrigation method. I know that in the current version of Hydrus there is a practical option for drip irrigation in 2D but first I like to know what would be the best approach in the 3D? Now I'm considering a circle arou...