Title of article :
DRAG CO-EFFICIENT IN A CRYSTAL SUSPENSION
Author/Authors :
Hassan, N. M. S. Engineering and Health CQUniversity - Faculty of Sciences - Process Engineering Light Metals (PELM) Centre, AUSTRALIA , Khan, M. M. K. Central Queensland University - College of Engineering and Built Environment, AUSTRALIA , Rasul, M. G. Central Queensland University - College of Engineering and Built Environment, AUSTRALIA , Rackemann, D.W. Queensland University of Technology - Sugar Research and Innovation, AUSTRALIA
Abstract :
A single air bubble rising in xanthan gum crystal suspension has been studied experimentally. The suspension was made by different concentrations of xanthan gum solutions with 0.23 mm polystyrene crystal particles. Drag co-efficient data and a new correlation of drag coefficient is presented for spherical and nonspherical bubbles in non-Newtonian crystal suspension. The correlation is developed in terms of the Reynolds number, Re and the bubble shape factor, Ǿ (the ratio between the surface equivalent sphere diameter to the volume equivalent sphere diameter). The experimental drag coefficient was found to be consistent with this new predicted correlation and published data over the ranges, 0.1 Re 200 and 1 Ǿ 2.5.
Keywords :
Crystal suspension , bubble rise velocity , drag co , efficient , bubble shape factor
Journal title :
International Journal of Mechanical and Materials Engineering
Journal title :
International Journal of Mechanical and Materials Engineering
