Hi Adrian,
> This seems to be a bug. I added it to the CodeBeamer
> system we use for project planning and development.
> http://openmodelica.ida.liu.se:8080/cb/issue/1012
Shall I submit (possible) bugs there or should I use the
openmodelicainterest mailing list?
Dieter
>
> Cheers,
> Adrian Pop/
>
> dieter wrote:
>> Hi,
>>
>> I've got strange results with my overall model, even though the isolated
>> classes seem to work reasonably while testing. Basically I'd like to
>> simulate a hydraulic circuit, with a pump flow changing in time and
>> subsequent flow resistances.
>>
>> I reduced the problem to the following 3 primitive classes:
>>
>> connector Port
>> Real pressure;
>> flow Real flowrate;
>> end Port;
>>
>> model Pipe
>> Port port;
>> parameter Real a = 1;
>> equation
>> port.pressure = port.flowrate * a;
>> end Pipe;
>>
>> model Pump
>> Port port;
>> equation
>> port.flowrate = -( time - port.pressure);
>> end Pump;
>>
>> //------------------------------
>>
>> model Test
>> Pump pu;
>> Pipe pi;
>> equation
>> connect(pu.port,pi.port);
>> end Test;
>>
>> // simulate(Test);
>>
>> Probably I've some severe misconceptions about coupling of the
>> components because the model does not reproduce the analytical solution:
>>
>> pi.flowrate = time/(1+a)
>>
>> Results are basically constant (except for the time variable). There is
>> only a step change at the last time step!?
>>
>> Where am I wrong? Without your help, I'm totally stuck now! (I'm using
>> version 1.4.4 of OM.)
>>
>> Dieter
>>
>> --
>> Best wishes
>>
>> H. Dieter Wilhelm
>> Darmstadt, Germany
