Comparative study on heat transfer enhancement of nanofluids flow in ribs tube using CFD simulation

Abstract

This study presents, a numerical investigation of two‐dimensional turbulent nanofluids flow in different ribs tube configurations on heat transfer, friction, and thermal performance coefficients using ANSYS‐FLUENT software version‐16. Governing equations of mass, momentum, and energy have been solved by means of a finite volume method (FVM). Four types of nanoparticles namely; Al2O3, CuO, SiO2, and ZnO with volume fraction range (1%‐4%) and different size of nanoparticles (dp = 30 nm, 40 nm, 50 nm, and 60 nm) with various Reynolds number (10 000‐30 000) in a constant heat flux tube with rectangular, triangular, and trapezoidal ribs were conducted for simulation. The results exhibit that Nusselt number for all cases enhanced with Reynolds number and nanofluid volume fraction increases. Likewise, the results also reveal that SiO2 with volume fractions of 4% and diameters of nanoparticles of 30 nm in triangular ribs offered the highest Nusselt number at Reynolds number of Re = 30 000. In addition, the higher value of thermal performance factor was obtained at Reynolds number of Re = 10 000.

Modeling the effective thermal conductivity of nanofluids using full factorial design analysis

“…Metal oxide nanoparticles are used in the present work because they are the most employed in heat transfer applications due to their low cost. They are produced by conventional methods and are more stable than metallic nanoparticles . Three types of oxide metal nanoparticles are studied: Aluminum oxides (Alumina), Al 2 O 3 ; Titanium oxides (Titania), TiO 2 ; and Copper oxides, CuO .…”

“…They are produced by conventional methods and are more stable than metallic nanoparticles. 39 Three types of oxide metal nanoparticles are studied: Aluminum oxides (Alumina), Al 2 O 3 40 ; Titanium oxides (Titania), TiO 2 ; and Copper oxides, CuO. 41,42 The corresponding thermophysical properties of the base fluid (water) 43 and solid phases are given in Table 2.…”

Experimental investigation on heat transfer and pressure drop characteristics in a smooth tube with different twisted tape inserts

“…Various researchers have performed the experiments on the thermal performance of various corrugated tubes with pitch ranges from 2 to 64 mm. Studies have also been done for the various diameter ratios range from 0.31 to 0.59.…”

“…Various researchers [20][21][22][23][24][25][26][27][28][29] have performed the experiments on the thermal performance of various corrugated tubes with pitch ranges from 2 to 64 mm. Studies [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] have also been done for the various diameter ratios range from 0.31 to 0.59.…”

LBM simulation of forced convective channel flow containing multiple obstacles: Effects of obstacles height and position

“…Their review showed that the heat transfer enhancement increases due to increase Reynolds number and they also introduced some new configurations of backward and forward facing steps. Salman conducted a comparative study to investigate the heat transfer of nanofluid flow in rib tubes. He used three different types rib, namely, triangular, trapezoidal, and rectangular.…”