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Old 21st July 2009, 08:33 AM   #11
Henkjan is offline Henkjan  Netherlands
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OK, I'll work with that for starters, thanks. I have a TH build lined up, so I will make an accurate model in Akabak and "play around" with damping and compare with measurements
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Old 1st December 2010, 06:37 AM   #12
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Sorry to resurrect a forgotten thread, but.....

I am using Akabak (excellent program, steep learning curve) to model some weird-ish stuff and I face the same problem with including stuffing in the simulations.

Is it kosher to bust the model into little segments and play with the visc parameter? I am anticipating making some physical mules to test this, and maybe work backwards to some viable approximation, but I do not wish to go into the wheel reinvention business. That area of activity is fully subscribed already....

Can anybody shed any definitive light on this subject?

I have done quite a bit of comparison between Akabak-with-viscosity and MJK worksheets (and hornresp, and generic T/S models too) modelling the same simple enclosures and I have achieved no sense of convergence at all.

I know Akabak works well to expose the underlying operational modes of more complex enclosures, but there comes a time when a little more subtlety is required and one of my 'thought experiments' really does rely on reasonably trustworthy modelling of damped volumes.

Any assistance is very welcome!

Keith Arnold
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Old 2nd December 2010, 07:15 AM   #13
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Bump.
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Old 2nd December 2010, 08:56 PM   #14
Henkjan is offline Henkjan  Netherlands
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Quote:
Originally Posted by blakkshepeaudio View Post
Is it kosher to bust the model into little segments and play with the visc parameter? .....
that would be the best option I think (reading Geitmans post on the prevous page), together with fidling with the Q factos (as suggested by Joerg Panzer)
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Old 3rd December 2010, 12:49 AM   #15
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Henkjan,

Thanks for your reply.

I guess it is just a bit more 'empirical' than I had hoped - looks like I need to make some sawdust!

Did you have any success correlating your modelling and results?
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Old 3rd December 2010, 10:44 PM   #16
Henkjan is offline Henkjan  Netherlands
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not yet, I plan to do some thorough testing of different models in the spring
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