# Porous media

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 September 18, 2011, 10:33 Porous media #1 New Member   MPrabanchan Join Date: Sep 2011 Location: Tamilnadu, India Posts: 8 Rep Power: 7 Sponsored Links Kq = dP/dx * 1/u^2 [kg/m^4] This is the formula for Quadratic Resistanc Coefficient Can any one explain each term in this formula

 September 18, 2011, 18:23 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,737 Rep Power: 106 dP/dx is the pressure change (loss) in the direction of flow. u is the velocity. That's about all there is to it.

 September 19, 2011, 03:00 #3 New Member   MPrabanchan Join Date: Sep 2011 Location: Tamilnadu, India Posts: 8 Rep Power: 7 How to calculate dP/dx?My analysis work is to find the pressure drop in the Catalytic converter

 September 19, 2011, 06:13 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,737 Rep Power: 106 Either from experimental data or you can assume it to be some known flow (maybe a pipe flow, or flat plate) and assume the catalytic converter pressure drop can be approximated by it.

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