Determination of Transition Length in Flow Through Porous Sand Material

ABSTRACT

A transition length is normally observed when

fluid flows through a conduit before laminar flow is

accomplished. This work examined a situation

whereby porous materials were filled into the

conduit and fluid was made to flow through. An

attempt was made to determine this transition

length for flow of water through riverbed sand of

varying porosities filled into a horizontal cylindrical

pipe of diameter 0.345 x m with piezomefric

water head, set at 0.06m. The transition length

was observed to be constant for the samples

considered and it occurred at 0.60m from the

point of entrance; nevertheless, values of

pressure at this point increases with increase in

porosity.