Controlled stress rheological measurement of blackgram flour dispersions Original Research Article

The controlled stress measurement of the rheology of blackgram flour dispersions at different solid concentrations (5–30%) was conducted employing a coaxial cylinder attachment. The dispersions behaved like shear-thinning fluids with flow behaviour indices (0.91–0.44) decreasing with an increase in solid concentration. The experimental yield stresses were between 115 and 2375 mPa and obeyed the Herschel–Bulkley model as judged by low values (⩽1.4%) of root mean square between the experimental and predicted values. An increase in solid concentration increased the yield stress, consistency index and apparent viscosity of these dispersions. Time-dependency was observed with these dispersions and showed thixotropic behaviour.