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S. K. Sharma - One of the best experts on this subject based on the ideXlab platform.
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dynamic Liquid saturation in a trickle bed reactor involving Newtonian non Newtonian Liquid phase
Industrial & Engineering Chemistry Research, 2009Co-Authors: Ajay Bansal, Ravinder K. Wanchoo, S. K. SharmaAbstract:Dynamic Liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic Liquid saturation, by using Newtonian Liquid phase, include gas and Liquid flow rates, surface tension and viscosity of the Liquid phase, and bed configurations. Additional rheological parameters affecting dynamic Liquid saturation, in case of non-Newtonian viscoinelastic Liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and Liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire rang...
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Dynamic Liquid Saturation in a Trickle Bed Reactor Involving Newtonian/non-Newtonian Liquid Phase
Industrial & Engineering Chemistry Research, 2009Co-Authors: Ajay Bansal, Ravinder K. Wanchoo, S. K. SharmaAbstract:Dynamic Liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic Liquid saturation, by using Newtonian Liquid phase, include gas and Liquid flow rates, surface tension and viscosity of the Liquid phase, and bed configurations. Additional rheological parameters affecting dynamic Liquid saturation, in case of non-Newtonian viscoinelastic Liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and Liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire rang...
Ajay Bansal - One of the best experts on this subject based on the ideXlab platform.
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dynamic Liquid saturation in a trickle bed reactor involving Newtonian non Newtonian Liquid phase
Industrial & Engineering Chemistry Research, 2009Co-Authors: Ajay Bansal, Ravinder K. Wanchoo, S. K. SharmaAbstract:Dynamic Liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic Liquid saturation, by using Newtonian Liquid phase, include gas and Liquid flow rates, surface tension and viscosity of the Liquid phase, and bed configurations. Additional rheological parameters affecting dynamic Liquid saturation, in case of non-Newtonian viscoinelastic Liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and Liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire rang...
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Dynamic Liquid Saturation in a Trickle Bed Reactor Involving Newtonian/non-Newtonian Liquid Phase
Industrial & Engineering Chemistry Research, 2009Co-Authors: Ajay Bansal, Ravinder K. Wanchoo, S. K. SharmaAbstract:Dynamic Liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic Liquid saturation, by using Newtonian Liquid phase, include gas and Liquid flow rates, surface tension and viscosity of the Liquid phase, and bed configurations. Additional rheological parameters affecting dynamic Liquid saturation, in case of non-Newtonian viscoinelastic Liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and Liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire rang...
Ravinder K. Wanchoo - One of the best experts on this subject based on the ideXlab platform.
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dynamic Liquid saturation in a trickle bed reactor involving Newtonian non Newtonian Liquid phase
Industrial & Engineering Chemistry Research, 2009Co-Authors: Ajay Bansal, Ravinder K. Wanchoo, S. K. SharmaAbstract:Dynamic Liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic Liquid saturation, by using Newtonian Liquid phase, include gas and Liquid flow rates, surface tension and viscosity of the Liquid phase, and bed configurations. Additional rheological parameters affecting dynamic Liquid saturation, in case of non-Newtonian viscoinelastic Liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and Liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire rang...
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Dynamic Liquid Saturation in a Trickle Bed Reactor Involving Newtonian/non-Newtonian Liquid Phase
Industrial & Engineering Chemistry Research, 2009Co-Authors: Ajay Bansal, Ravinder K. Wanchoo, S. K. SharmaAbstract:Dynamic Liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic Liquid saturation, by using Newtonian Liquid phase, include gas and Liquid flow rates, surface tension and viscosity of the Liquid phase, and bed configurations. Additional rheological parameters affecting dynamic Liquid saturation, in case of non-Newtonian viscoinelastic Liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and Liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire rang...
Swadesh M Mahajan - One of the best experts on this subject based on the ideXlab platform.
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theory of creeping gravity currents of a non Newtonian Liquid
Physical Review E, 1999Co-Authors: Julio Gratton, F Minotti, Swadesh M MahajanAbstract:Recently several experiments on creeping gravity currents have been performed, using highly viscous silicone oils and putties. The interpretation of the experiments relies on the available theoretical results that were obtained by means of the lubrication approximation with the assumption of a Newtonian rheology. Since very viscous fluids are usually non-Newtonian, an extension of the theory to include non-Newtonian effects is needed. We derive the governing equations for unidirectional and axisymmetric creeping gravity currents of a non-Newtonian Liquid with a power-law rheology, generalizing the usual lubrication approximation. The equations differ from those for Newtonian Liquids, being nonlinear in the spatial derivative of the thickness of the current. Similarity solutions for currents whose volume varies as a power of time are obtained. For the spread of a constant volume of Liquid, analytic solutions are found that are in good agreement with experiment. We also derive solutions of the waiting-time type, as well as those describing steady flows from a constant source to a sink. General traveling-wave solutions are given, and analytic formulas for a simple case are derived. A phase plane formalism that allows the systematic derivation of self-similar solutions is introduced. The application of the Boltzmann transform is briefly discussed.more » All the self-similar solutions obtained here have their counterparts in Newtonian flows, as should be expected because the power-law rheology involves a single-dimensional parameter as the Newtonian constitutive relation. Thus one finds similarity solutions whenever the analogous Newtonian problem is self-similar, but now the spreading relations are rheology-dependent. In most cases this dependence is weak but leads to significant differences easily detected in experiments. The present results may also be of interest for geophysics since the lithosphere deforms according to an average power-law rheology. (c) 1999 The American Physical Society.« less
Yoshinori Kawase - One of the best experts on this subject based on the ideXlab platform.
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bed expansion in Liquid solid two phase fluidized beds with Newtonian and non Newtonian fluids over the wide range of reynolds numbers
Powder Technology, 2001Co-Authors: H Miura, T Takahashi, J Ichikawa, Yoshinori KawaseAbstract:Abstract Bed expansion characteristics in Newtonian and non-Newtonian fluid–solid two-phase fluidized bed have been examined. Bed expansion measurements were carried out for a bed of glass beads fluidized in Newtonian Liquids (water and glycerol solutions) and non-Newtonian Liquids (aqueous solutions of carboxymethyl cellulose (CMC) and xanthan gum). Measurements of bed voidage covered a terminal particle Reynolds number from 8.14 to 3947 and a flow index in a power-law model from 1 to 0.625. The bed voidage increased with an increase in the superficial Liquid velocity and the magnitude of the increase became smaller as particle size increased. Increase in viscous non-Newtonian flow behaviour resulted in an increase of the bed voidage. The generalized correlation for the bed voidage was developed for Newtonian and non-Newtonian Liquid–solid two-phase systems by extending the correlation of the drag coefficient for single particles to multiparticle systems. The predictions for bed voidage were in reasonable agreement with the present experimental data and the data in the literature for Newtonian and non-Newtonian Liquid–solid two-phase systems in the whole Reynolds number region.