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Help in porosity for knitted fabric??? Linear or Quadratic resistance coeff |
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September 15, 2011, 15:50 |
Help in porosity for knitted fabric??? Linear or Quadratic resistance coeff
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#1 |
New Member
Join Date: Sep 2011
Posts: 11
Rep Power: 14 |
Hi,
For knitted fabric having porosity of 30 and 50% similar to these photos Any suggesions of resonable values for Linear or Quadratic resistance coefficients? or permeability I need these values to define the porous material. I have spent considerable time searching for any useful literature for this issue. What is the range of values you expect would be appropriate for such fabric? For example: Quadratic resistance coefficients = 300 kg/m^4? Is it possible to calculate these values? I have gone through almost all threads regarding above parameters in this forum, I have been in this link too: http://www.cfd-online.com/Wiki/Fluen...e_drop_data.3F but the problem is that I don't have and can't perform experiment to obtain the required data. Could obtaining the loss coefficient K_loss and head loss be of any help? using this link http://www.thermal-wizard.com/tmwiz/ Regards |
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