Re: model the underground water surface

Dear Halim

Hi

Thanks a lot!!!!

I have looked into the ABAQUS/Standard,and it is writed " Drainage-
only flow type labels QnD and QD are used on the data lines of the 
*FLOW and *SFLOW options, respectively, to indicate that normal pore 
fluid flow occurs """"only from the interior to the exterior region 
of the model.""""

So if the outward direction of surface is rightly defined from ground 
to ground water surface,I think 
*sflow
watersurface,QD,ks(Defining drainage-only flow)
can really do this. Is that right?

Best regards
Xuhan


--- In ABAQUS@xxxxxxxxxxxxxxx, Darwid Halim <acin_lim@xxxx> wrote:
> 
> Hi,
> 
> If you use 
>   *sflow
>    watersurface,QD,ks(Defining drainage-only flow)
> Then, it means the ground water will flow to the
> surface. It is quite strange. Since what you want is
> the rainfall into the ground surface, not vise versa. 
> 
>   *boundary
>    watersurface,8,,0.
> If you use that one, it is just a boundary conditions
> that watersurface pore water pressure is zero all the
> time. 
> 
> I am not so sure which one should you use. However, I
> know there is one example about how to use *sflow from
> ABAQUS. You go to the help file and then search for
> benchmark example. Over there there is an example with
> dam. Take a look that example. May be it can help you.
> 
> Darwid Halim









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