The two‐fluid modelling of gas‐particle transport phenomenon in confined systems considering inter particle collision effects

Abstract

If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.Abstract A modelling approach of gas solid flow, considering different physical phenomenon such as fluid turbulence, particle turbulence and interparticle collision effects are presented. The approach is based on the two-fluid model formulation where both phases are treated as continuum. This implies that the gas phase as well as the particle phase are weighted by their separate volumetric fractions. According to the experimental results and numerical simulations, the inter-particle collision possesses a significant influence of turbulence level on particle transport properties in gas solid turbulent flow even for dispersed phase volume fraction (a , 0.01). Comparisons in predictions have been depicted with inclusion of interparticle collision effect in the equation of particle turbulent kinetic energy and with exclusion of this effect. Experimental research has been conducted in a thermal power plant depicting higher erosion resistance of noncircular square sectioned coal pipe bends in comparison with those with circular cross section, the salient features of the experimental work are presented in this paper. Experiments have been conducted to determine, pressure drop in straight and curved portions of conduits conveying air coal mixtures in a thermal power plant. Validation of this experimental data with numerical predictions have been presented.

Toward two‐phase flow modeling of nondilute sediment transport in open channels

“…Woo et al [1988] argued that when C max > 0.04, the models developed for dilute flows do not work. Greimann and Holly [2001] and Mitter et al [2004] adopted the value C max = 0.1 for the threshold beyond which the flow is nondilute. This raises the basic and very important question about the range of validity of the models developed for dilute and nondilute cases.…”

Numerical investigations on particle separation in dynamic separators

“…The only difference is the inclusion of particle collision in the results shown to the right of Figure 2(b). Previous studies by Mitter et al (2004) and Gorman and Sparrow (2018) have reported the importance of inter-particle collision on the coarse particle transport properties in gas-solid turbulent flows. The results from the present study also support the previous conclusion about the influence of inter-particle collision in particle transport.…”

Shape modification of an axial flow turbine nozzle to reduce erosion

“…The key to understanding erosion is a detailed knowledge of coupled and complex fluid/solids interactions (Mitter et al, 2004;Habib et al, 2005). Because of experimental difficulties, solids motion studies are not common.…”