Interfacial area density calculation
 

Dear friend

Can you please give the information about inter-facial area density calculation

For example
I have straight pipe which is porous domain of inner radius 10mm and thickness of the wall 3mm
and length of the pipe is 100mm through which fluid flow through it
How to calculate inter-facial area density
I did this way
Inter facial area density= surface area contact/ Volume

surface area= 2*pi*r*h/pi *r^2*h

=2*pi*10*100/ pi*10^2*100

= 2/10 mm^-1

Kindly give your valuable feedback

Thank you

Regards

Govind