[Nek5000-users] Add a forcing term on scalar equation

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

Thanks. 
So I just used the "USERQ" to implement the forcing term to scalar filed explicitly.
 
In the next step, I want to coupled the scalar field to Navier-Stokes equation using a forcing term.
In this case, the forcing term is a function of scalar field and I would like to implement it implicitly.
As far as I know, if I used USERF, the scheme is explicit. So how can I add a forcing term to N-S equation implicitly!?

Iman



________________________________________
From: nek5000-users-bounces at lists.mcs.anl.gov [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
Sent: Thursday, January 19, 2012 4:20 PM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] Add a forcing term on scalar equation

It's actually evaluated explicitly, so you shold be ok.

Paul


On Thu, 19 Jan 2012, nek5000-users at lists.mcs.anl.gov wrote:

> Hi
>
> I would like to add a forcing term to the scalar equation.
> According to the Nekton manual, Chapter 5, the forcing term is treated implicitly and the convective term is integrated using the third order Adam_Bashforth scheme (AB3).
> For my case, the forcing term is a nonlinear function of the scalar field, so I cannot use the implicit scheme and I should lump it with the AB3.
> Therefore, could you please guide me and indicate where in the code I can find the implementation of AB3 for the convective term of passive scalar?
>
> Cheers
> Iman
>
>
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