[Nek5000-users] previous value of drag coefficient

[nek5000-users at lists.mcs.anl.gov]

Hi,
I suggest to use lag arrays as done for the BDF scheme, that is to have an array of size #multisteps and at each new time step to copy the old RHS (as you do AB) one step backwards.
This is then somewhat consistent with Nek. Just be careful during the startup.
Hth, Philipp

On November 22, 2017 10:31:11 AM GMT+01:00, nek5000-users at lists.mcs.anl.gov wrote:
>Hi Neks, 
>
>Since I am trying to implement Adams bashforth scheme on my FSI problem
>(for equation of motion), I would like to pass the lift coefficients of
>the current timestep and the just previous time step to the function
>where I implemented the Adams Bashforth module. But its seems a bit
>difficult to fetch the just previous value of dragy value since it
>calls a new value at every time step. I simply tried a swapping method.
>But it gets zero value. Could you please tell me whether is there any
>way to fetch the just previous value of a variable (from an array or
>something?) 
>
>
>Thanks regards 
>
>Sijo GEORGE 

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