On Mar 21, 2019, at 1:44 PM, Daniel Wheeler wrote:
>
>> I get the error:
>>
>> ExplicitVariableError: Terms with explicit Variables cannot mix with Terms
>> with implicit Variables.
>
> That's because of the parentheses I think.
The problem is that in
```
eq = (DiffusionTerm(coeff=(1.0), var
That worked thanks!
> On 21 Mar 2019, at 18:44, Daniel Wheeler wrote:
>
> On Thu, Mar 21, 2019 at 1:14 PM Meier Quintin
> wrote:
>>
>> Dear Daniel,
>> Thanks a lot for the help. I got it to work by adding a transientterm().
>>
>> If I try to use your second trick though:
>>
>> eq = (Diffusi
On Thu, Mar 21, 2019 at 1:14 PM Meier Quintin wrote:
>
> Dear Daniel,
> Thanks a lot for the help. I got it to work by adding a transientterm().
>
> If I try to use your second trick though:
>
> eq = (DiffusionTerm(coeff=(1.0), var=phi) - numerix.sin(phi) + phi *
> numerix.cos(phi)-ImplicitSource
Dear Daniel,
Thanks a lot for the help. I got it to work by adding a transientterm().
If I try to use your second trick though:
eq = (DiffusionTerm(coeff=(1.0), var=phi) - numerix.sin(phi) + phi *
numerix.cos(phi)-ImplicitSourceTerm(numerix.cos(phi)) == TransientTerm(var=phi))
I get the error:
On Thu, Mar 21, 2019 at 11:48 AM Daniel Wheeler
wrote:
>
> with a transient term in the equation. For small phi, this should
> never be negative, since phi should only grow, but for delta_t > 1
That's wrong, phi should shrink, but not go negative.
--
Daniel Wheeler
_
Hi Qunitin,
I think you need to relax the updates on this. Introducing a transient
term does that. I think that the b vector causes and instability. The
b vector is
phi_old - delta_t * sin(phi_old)
with a transient term in the equation. For small phi, this should
never be negative, since phi
