Numerical Study of the Thermal and Hydraulic Characteristics of the SiO2–Water Nanofluid through a Backward-Facing Step
Abstract
The work of this paper is devoted to the two-dimensional numerical investigation of the turbulent forced convection through backward-facing step. Two cases are taken into account. For the first, the bottom wall is smooth; but for the second case, it is corrugated with a triangular base containing ten corrugations. A uniform heat flux is imposed on the bottom wall. A flow of a nanofluid consisting of silicon dioxide SiO2 nanoparticles dispersed in a base fluid (water) flows through this step.The flow equations were discretized by the finite volume method. For modeling turbulence, the K-ɛ-RNG model was applied to analyze Reynolds number effect, the volume fraction and the size of the particle. Numerical simulations were conducted for various Reynolds between 10,000 and 40,000; volume fractions of nanoparticles which vary from 0 to 5% and particle diameter dp equal to 30; 50 and 70 nm. We noted that the obtained findings are in good conformity with those of the literature.
Keywords
Forced convection Turbulent flow Backward-facing step channel Corrugated channel SiO2 – water Nanofluid
References
- Ahmed, M. A., Shuaib, N. H., Yusoff, M. Z., & Al - Falahi, A. H. (2011). Numerical investigations of flow and heat transfer enhancement in a corrugated, channel using nanofluid. International Communications in Heat and Mass Transfer, 38(10), 1368–1375.
- Ahmed, M. A., Yusoff, M. Z., & Shuaib, N. H. (2013). Effects of geometrical parameters on the flow and heat transfer characteristics in trapezoidal-corrugated channel using nanofluid. International Communications in Heat and Mass Transfer, 42, 69–74.
- Ahmed, M. A., Yusoff, M. Z., Ng, K. C., & Shuaib, N. H. (2014). Effect of corrugation profile on the thermal–hydraulic performance of corrugated channels using CuO–water nanofluid. Case Studies in Thermal Engineering, 4, 65–75.
Details
| Primary Language | English |
|---|---|
| Subjects | Environmental and Sustainable Processes |
| Journal Section | Articles |
| Authors | |
| Early Pub Date | December 24, 2023 |
| Publication Date | December 30, 2023 |
| Published in Issue | Year 2023Volume: 26 |
