Search found 5 matches

by ahmet19
Sat Dec 07, 2019 8:15 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP2 running so slow
Replies: 6
Views: 1956

Re: HP2 running so slow

I used phreeqcU.dat with adding Ca and Mg uranyl species. #calcium uranyl carbonates 1.000Ca+2 + 1.000UO2+2 + 3.000CO3-2 = CaUO2(CO3)3-2 #-llnl_gamma 4.7 log_k 27.180 #06DON/BRO, 2014 THO/HUM # delta_h 0.000 #kJ/mol # Enthalpy of formation: #kJ/mol -analytic 2.718E+1 0E+0 0E+0 0E+0 0E+0 2.000Ca+2 + ...
by ahmet19
Sat Dec 07, 2019 9:43 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP2 running so slow
Replies: 6
Views: 1956

Re: HP2 running so slow

Here is the script. KNOBS -iterations 450 -convergence_tolerance 1e-08 -tolerance 1e-18 -step_size 10 -pe_step_size 5 -diagonal_scale true SOLUTION_MASTER_SPECIES Ethoxide HEthoxide 0.0 46.0605 46.0605 #HEthoxide=Ethanol SOLUTION_SPECIES H2O + 0.01e- = H2O-0.01 #for convergence log_k -9.0 HEthoxide...
by ahmet19
Sat Dec 07, 2019 4:40 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP2 running so slow
Replies: 6
Views: 1956

Re: HP2 running so slow

I tried cvode but it is still slow and it doesn't converge after some point. Also, I tried in HP1 but it is still the same. I am using the Monod type equation for uranium bioreduction and cell growth. I think I should try to modify the step_divide to find a value that runs fast and converge. By the ...
by ahmet19
Tue Dec 03, 2019 5:35 am
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP2 running so slow
Replies: 6
Views: 1956

HP2 running so slow

Hi, I trying to model a reactive transport of uranium bioreduction. I wrote bioreactions and their rate laws under the RATES and KINETICS keywords but it is running so slow, and simulations don't proceed after a certain time and just freeze middle of the run. Is there any reason that causes to slows...
by ahmet19
Sun Nov 03, 2019 7:58 pm
Forum: HP1 (HYDRUS-1D - PHREEQC)
Topic: HP1 pH differences from PHREEQC run
Replies: 1
Views: 1144

HP1 pH differences from PHREEQC run

Hi, I am trying to simulate uranium transport with surface complexation however HP1 results always end up with very different results from the PHREEQC GUI. I am able to get good results from PHREEQC GUI but I don't know why HP1 results are not the same with PHREEQC GUI results, particularly for pH. ...