Manuel Valera writes:
> Yes, all of that sounds correct to me,
>
> No I haven't tried embedding the column integral into the RHS, right now I
> am unable to think how to do this without the solution of the previous
> intermediate stage. Any ideas are welcome,
Do you have some technical notes on
Yes, all of that sounds correct to me,
No I haven't tried embedding the column integral into the RHS, right now I
am unable to think how to do this without the solution of the previous
intermediate stage. Any ideas are welcome,
Thanks,
On Wed, Oct 9, 2019 at 4:18 PM Jed Brown wrote:
> Manuel V
Manuel Valera writes:
> Sorry, I don't follow this last email, my spatial discretization is fixed,
> the problem is caused by the choice of vertical coordinate, in this case
> sigma, that calls for an integration of the hydrostatic pressure to correct
> for the right velocities.
Ah, fine. To ph
Sorry, I don't follow this last email, my spatial discretization is fixed,
the problem is caused by the choice of vertical coordinate, in this case
sigma, that calls for an integration of the hydrostatic pressure to correct
for the right velocities.
I had RK3 working before and SSP is much more s
Is it a problem with the spatial discretization or with the time
discretization that you've been using thus far? (This sort of problem
can occur for either reason.)
Note that an SSP method is merely "preserving" -- the spatial
discretization needs to be strongly stable for an SSP method to preser
To correct for the deformation of the sigma coordinate grid... without this
correction the velocity become unphysical in the zones of high slope of the
grid. This is very specific of our model and probably will be solved by
updating the equations transformation, but that's not nearly close to
happe
Thanks,
My time integration schemes are all explicit, sorry if this a very atypical
setup. This is similar to the barotropic splitting but not exactly, we
don't have free surface in the model, this is only to correct for sigma
coordinates deformations in the velocity field.
>From how i see it thi
Manuel Valera writes:
> Thanks,
>
> My time integration schemes are all explicit, sorry if this a very atypical
> setup. This is similar to the barotropic splitting but not exactly, we
> don't have free surface in the model, this is only to correct for sigma
> coordinates deformations in the velo
Manuel Valera writes:
> Thanks for the answer, I will read the mentioned example, but to clarify
> for Barry I will schematize the process:
>
> At time n, the program need to do all of these at once:
>
>1. Solve T as a function of u,v,w
>2. Solve S as a function of u,v,w
>3. Solve rho
Thanks for the answer, I will read the mentioned example, but to clarify
for Barry I will schematize the process:
At time n, the program need to do all of these at once:
1. Solve T as a function of u,v,w
2. Solve S as a function of u,v,w
3. Solve rho density as a function of T,S
4. De
Manuel Valera via petsc-users writes:
> Hello,
>
> I have a set of equations which are co-dependent when integrating in time,
> this means the velocities u,v,w need a component from the Temperature and
> Salinity integration at the same intermediate step. Same for Temperature
> and Salinity, whic
How are you integrating the two sets of variables now?
Would it be possible to just integrate all five variables together and not
have any of these difficulties?
Barry
> On Oct 9, 2019, at 6:03 PM, Manuel Valera via petsc-users
> wrote:
>
> Hello,
>
> I have a set of equation
Hello,
I have a set of equations which are co-dependent when integrating in time,
this means the velocities u,v,w need a component from the Temperature and
Salinity integration at the same intermediate step. Same for Temperature
and Salinity, which need the current velocities (at the intermediate
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