Numerical and Experimental Analysis for Fluid Flow Inside Corrugated Tube quipped with Twisted Tapes

Document Type : Research Article

Authors

1 PhD student of Department of Mechanical Engineering, ,University Campus 2, University of Guilan, Rasht, Iran,

2 Instructor of Department of Mechanical Engineering, Faculty of Engineering, University of Guilan

Abstract

The aim of present paper is to study numerical simulation by using finite volume method for Newtonian and non-Newtonian fluid flow inside corrugated tube equipped with typical twisted tape and V-cut twisted tape at constant heat flux. For validation of this simulation, this results compared with empirical correlations of researchers. In this analysis water was as Newtonian fluid and 0.2 wt % carboxymethyle cellulse in water was as a non-Newtonian fluid, the range of Reynolds number for Newtonian and non-Newtonian fluid varied 5300 to 25700 and 2400 to 6800 respectively. In this analysis, the effects of using different turbulence models, variable heat flux and creating V-cut on Nusselt number and friction factor is investigated. The obtained results showed that standard κ -ω model of turbulence for Newtonian fluid is a proper model rather than the other models and it had good agreements between experimental data, and the average differences for Nusselt number in typical and V-cut twisted tapes were less than 15.2% and 14.4% respectively. On other hand, in identical condition for non-Newtonian fluid, using of standard κ - ε model of turbulence is a proper model rather than the other models and the average differences on Nusselt number for typical twisted tape were less than 18%..

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Main Subjects


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