Effect of temperature on rheological behavior of guar gum and xanthan gum of different concentrations
The rheology of the guar gum and xanthan gum solution has been studied under different temperatures and concentration levels by using the OFITE model 900 viscometer. Sample solutions with concentration of 0.5g/l, 1g/l, 3g/l, 6g/l and 7g/l were prepared. Changes in rheology for these concentrations were studied at 0.6 °C, 5 °C, 15 °C, 19 °C and 30.6 °C. Additionally, efforts were made to include subzero temperatures in the study, which resulted in complete freezing of these solutions regardless of concentration level. The range of shear rate applied varied from 17.02 s-1 to 1021.38 s-1. It was observed that the sample solutions with high concentrations (3g/l, 6g/l, and 7g/l) behaved as non-Newtonian shear-thinning fluids. Their viscosity increased with the increase in concentration but decreased with increase in temperature and shear rate. The maximum viscosity for both gums was achieved at a concentration of 7 g/l, a temperature of 0.6 °C and a shear rate of 17.02 s-1. However, solutions of 0.5g/L and 1g/L concentrations exhibited Newtonian behavior at all temperatures. The results of this study will help us accomplish our broad objective of using a non-Newtonian fluid for effective remediation of adsorbent contaminants in complex porous media under non-isothermal flow regimes.
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Meeting ID: 509-804-587