Explanation:
The given data is as follows.
Water flux, = 25
=
So, let velocity (u) = m/s =
= 998
Pore size, d =
= 0.9 cP = Pa.s
Hence, calculate the reynold number as follows.
=
=
= 0.006
This means that the flow is laminar.
Now, we use Hagen-Poiseuille equation as follows.
where, = membrane porosity = 0.35
d = m
=
=
= tortuosity
= membrane thickness =
= 3.73
Hence, the tortuosity factor of the pores is 3.73.
As flow resistance =
Water permeability is represented by .
=
Therefore, the resistance to flow is and its water permeability is .