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Difference b/W vol. avg. velocity and superficial velocity |
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March 4, 2011, 19:25 |
Difference b/W vol. avg. velocity and superficial velocity
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#1 |
New Member
Mohammad Waseem Tahir
Join Date: Apr 2010
Posts: 4
Rep Power: 16 |
hi all
i have a little confusion, i will be very thankful if someone can clerify it: if i use the superficial velocity (vol. flow rate/X-Area) then permeability can be given using the darcy's law as follows: K = mu*v_s/delta p; where v_s is superficial velocity, and delta p is the gradient of the pressure (pressure drop per unit length). In fluent i can get the volume averaged velocity under Reports-> volume integrals->, my question is that is this vol. averaged velocity is the same as the superficial velocity, and can i use it to calculate the K above. thanks |
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