Experimental database for non-Newtonian flow in four channel shapes

The database for non-Newtonian flow in rectangular open channels developed by the Flow Process Research Centre at the Cape Peninsula University of Technology was recently extended to include the testwork on non-Newtonian flow in open channels of semi-circular, triangular and trapezoidal cross-sections. As for flow in rectangular open channels, the flow of carboxymethylcellulose solutions and aqueous kaolin and bentonite suspensions was investigated in these open channels at angles varying from 1 degrees to 5 degrees. The flow curve data for these three fluids were best represented by the power law, Bingham plastic and Herschel-Bulkley models, respectively. The research methodology in the use of this extended database to study laminar, transitional and turbulent non-Newtonian open channel flows is described. It is hoped that this database will be a useful resource to researchers working in the field of non-Newtonian open channel flow.