Manish Chopra Bhabha Atomic Research Centre

Aquifer top elevation can be easily estimated based on the elevation of the top ground surface but how to estimate bottom elevation of the aquifer. It is not possible to physically determine the bottom elevation everywhere in the area under study. So it has to be estimated. But now the question arises whether the bottom elevation will follow the top elevation (i.e. top elevation minus fixed aquifer thickness) or the bottom of the aquifer will be flat (i.e. the variable aquifer thickness). How to deal with this problem. Can anybody help?

Dear friends

Is it possible to simulate for Fractured flow and contaminant transport in Feflow 5.2? If yes, please help me to understand the procedure.


Regards,
Manish

Another problem: I am solving a 3D transient flow and transient transport problem of radionuclides. For single species it is running properly but when i am changing it into multispecies, its not running properly. Time step also starts fluctuating (I am using predictor corrector technique for automatic time step). Another funny thing is that. When i am running parent for single species, concentration values are quite different than when i am running parent along with daughters in multispecies. With same properties how it can happen?

I faced a serious problem in Feflow 5.2. I was running multispecies (four species) without production. so i put 'k' corresponding to production equals to zero. It is equivalent to running four radioactive species independently. The results should be same whether we are running this way or we are running all the four species one by one one after the another. But i got different results for all except the first species. I guess even after putting 'k' corresponding to production equals to zero, some production is being taken automatically for the species except the first one. this i m saying because the results i obtained for species other than first one were similar to what i got if i consider other three species as daughter products of the first species and consider production term for these. Please help what can be the problem. 

Can i get some document explaining each and every option of feflow 5.2? Means if we are choosing some option like if i put Kd or rate etc where Feflow is actually using these inputs and how it is using it (e.g the related equation)?

One more question ...while doing single species how Feflow uses Kd and rate? Can u give me the decay equation?

I am using Feflow 5.2. Another query i am having is that when we do multispecies, parent remains the same. There is no change made to parent so whether single species or multispecies, for parent, results should be same for same properties?

Dear Alex

i wanna know, while simulating multispecies, in equation editor option there are three factors k, rate and C. Rate we are already putting in rate option. What should be k equal to? is it density multiplied by Kd?

Regards,
Manish

What is the limit up to which i can increase the residual water content?

Regards,
Manish Chopra

Hello everybody..
In feflow, it is supposed to put nodes on add in lines and points. Is there anything like if i am putting add in points/lines on the boundary it will not put node there?This is the thing i am experiencing. Looking for ur suggessions.

Thanks.

Regards,
Manish Chopra