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Given a viscosity is it possible to calculate required pressure for desired output?

CharlesDesign

Given a viscosity is it possible to calculate required pressure for desired output?
September 06, 2018 10:39AM

Registered: 10 years ago
Posts: 26

Hi All,

I have a setup similar to the one pictured and I'm trying to figure out what kind of pressure I need to deliver the throughput.

Is there a formula that'll predict throughput based on pressure and viscosity?

Thanks,
Charles

exdierod.jpg

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CharlesDesign

Re: Given a viscosity is it possible to calculate required pressure for desired output?
September 06, 2018 01:31PM

Registered: 10 years ago
Posts: 26

It seems that my question is being answered in the paper attached but I haven't been able to understand the concepts well enough to condense it into a single equation.

Specifically, I'd like to get a Melt Flow Index (MFI) value from a known shear stress and shear rate. (bottom of page 222, 223, 224)

Edited 2 time(s). Last edit at 09/06/2018 01:55PM by CharlesDesign.

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Attachments:
open | download - Melt_rheology_of_polymer_blends_from_mel.pdf (828.6 KB)

CharlesDesign

Re: Given a viscosity is it possible to calculate required pressure for desired output?
September 06, 2018 05:01PM

Registered: 10 years ago
Posts: 26

I posted this question in more detail on the 3D printing StackExchange

Edited 1 time(s). Last edit at 09/06/2018 05:01PM by CharlesDesign.