Problem with CST low speed when doing a project

i all

when i implement an example in CST, it calculatesvery fast and end simulation successfully

when i design my own project it takes a lot of more time and somethimes fails

ie : abnormally termination

i checked all the settings , and, i think, are the same of the examples(similar to my project ),what i do wrong ?

bye!

zb

It usually happen when the mesh is not correct or port is not defined properly. its better if u upload ur project.

this is a project im working on

its very slow on calculation

the ports are well set ?
and lumpedelements?

itwas optimized in microwave office, then exported in CST by a DXF layout file

at this point another questionis : what are the settings in CST that simulate at best the settings in MWO ?

tnx for youranswer

zb

hi,

did you solve this problem or do you still need help with it?

aw

PS:
hi again,

there are two things here

the ratio limit is quite high - time step is small since unecessary mesh points are used due to the cad import - try ratio limit 10

you've also set lines/wavelength = 8 - this should never be done - the wavelength sampling lower limit should always be at least 10

it seems to be fast enough (for the first mesh adaption pass.....)

good luck!

aw

PS:
hi again,

there are two things here

the ratio limit is quite high - time step is small since unecessary mesh points are used due to the cad import - try ratio limit 10

you've also set lines/wavelength = 8 - this should never be done - the wavelength sampling lower limit should always be at least 10

it seems to be fast enough (for the first mesh adaption pass.....)

good luck!

aw

tnx for answer

so it can be said that the big number of meshes depended by the cad import from microwave office to CST

if i design it directly to Cst it will be more fast ?

where can i check value of timestep ?

bye, however tnx

zb

The mesh also depend upon the span of frequency u want to run the simulation.

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