Search found 9 matches

by yarivts
Thu Dec 27, 2018 6:44 am
Forum: Hydrus 1D
Topic: Wrong output concentration
Replies: 7
Views: 659

Re: Wrong output concentration

By the way, is there any good example on the website for transport of hydrocarbons/solute with high adsorption values?
Yariv
by yarivts
Thu Dec 27, 2018 6:31 am
Forum: Hydrus 1D
Topic: Wrong output concentration
Replies: 7
Views: 659

Re: Wrong output concentration

Hey, I have solved the problem. The problem was with specifying the initial condition in in total concentrations.
Thanks
by yarivts
Wed Dec 26, 2018 2:41 pm
Forum: Hydrus 1D
Topic: Wrong output concentration
Replies: 7
Views: 659

Wrong output concentration

Hello, I'm trying to model a recovery treatment for a contaminated layered soil (20 m profile). My goal is to examine whether the existing pollutant will flushed down to the groundwater during the treatment. For simplification, the adsorption, diffusion and Henry coefficients were set to zero. The d...
by yarivts
Tue Jan 30, 2018 6:48 pm
Forum: HYDRUS (2D/3D)
Topic: Equilibrium of DO between the gas and liquid phases
Replies: 3
Views: 947

Re: Equilibrium of DO between the gas and liquid phases

Hey Jirka, many thanks for your fast reply. However, i still have some unsolved questions. When i inversely calculated the rate constant for O2 consumption with Hydrus (the constant was specified only in the liquid phase), the calculated values were consistently higher than the empirical one. I real...
by yarivts
Mon Jan 29, 2018 3:07 pm
Forum: HYDRUS (2D/3D)
Topic: Equilibrium of DO between the gas and liquid phases
Replies: 3
Views: 947

Equilibrium of DO between the gas and liquid phases

Hey I am modeling consumption of dissolved oxygen under different water contents. In particular, i am trying to evaluate the rate constants of DO consumption, using the inverse model and based on my empirical data. My questions are: 1. Does Hydrus assume immediate equilibrium between the solutes con...
by yarivts
Sun Jul 16, 2017 11:00 am
Forum: HYDRUS (2D/3D)
Topic: Incoming fluid with over-saturated dissolved oxygen
Replies: 6
Views: 4153

Re: Incoming fluid with over-saturated dissolved oxygen

Explanation is pretty simple. Note that HYDRUS does not consider convection of the gas and thus there is only diffusion in the gas phase (no convection). The mass of solute in any particular note at any particular time: S=theta*c_w+air*c_w*K_H=c_w*(theta+ air*K_H) If you change theta, solute needs ...
by yarivts
Sat Jul 15, 2017 7:44 pm
Forum: HYDRUS (2D/3D)
Topic: Incoming fluid with over-saturated dissolved oxygen
Replies: 6
Views: 4153

Re: Incoming fluid with over-saturated dissolved oxygen

File attached
Many thanks,
Yariv
by yarivts
Sat Jul 15, 2017 3:17 pm
Forum: HYDRUS (2D/3D)
Topic: Incoming fluid with over-saturated dissolved oxygen
Replies: 6
Views: 4153

Re: Incoming fluid with over-saturated dissolved oxygen

Jirka wrote:I would need to see your project to be able to comment on where the problem is. J.
How can i share/send it to you?
Thanks,
Yariv
by yarivts
Thu Jul 13, 2017 7:58 pm
Forum: HYDRUS (2D/3D)
Topic: Incoming fluid with over-saturated dissolved oxygen
Replies: 6
Views: 4153

Incoming fluid with over-saturated dissolved oxygen

Dear all, I'm currently modeling dissolved oxygen transport with the standard solute transport model. My domain size is 50 X 50 cm, I set the upper B.C to atmospheric and volatile B.C, no flux on the bottom and on the sizes. I specified the Henry constant to 31.25 [-], catm= 0.00869 mmol/cm^3, cboun...