Published 6 issues per year
ISSN Print: 2152-5102
ISSN Online: 2152-5110
Indexed in
Use of Surfactant Solutions for Drag Reduction in Gravity Driven Flow Systems
ABSTRACT
Experiments on efflux time are performed in the presence and absence of drag reducing agent for computing drag reduction in gravity driven flow systems. The system consists of a large cylindrical tank connected by an exit pipe located at the centre of the bottom of the tank. The drag reducing agent used is Dodecyl Benzene Sulfonate anionic surfactant. The variables studied are diameter of the storage tank, initial height of liquid in the tank, length of the exit pipe, concentration of surfactant. Optimum concentration of surfactant is found to be independent of the diameter and initial height of liquid in the tank as well as the length of the exit pipe. However, it is observed that drag reduction at optimum concentration (maximum drag reduction) is influenced by diameter of storage tank, initial height of liquid in the tank as well as the length of the exit pipe.