Abstract
This paper reports the effect of Brownian motion on fluid flow and heat transfer performance using various nanofluids in natural convection in a square enclosure. The energy and Navier–Stokes equations are solved numerically using a finite-volume approach. The effect of Brownian motion was employed based on a thermal conductivity model with a Brownian motion effect. The effect of the volume concentration on the enhancement of heat transfer was studied incorporating the Brownian motion. The influence of the effective thermal conductivity on the enhancement was also investigated for a range of volume fraction concentrations. Various volume concentrations were tested in the present study: 2%, 3%, 4%, and 6%. Different Raleigh numbers were investigated for different nanoparticles. The results revealed that an increase in the volume fraction deteriorates the heat transfer. The velocity gradients were also found to be affected by the volume fraction. The temperature profile for different Rayleigh numbers is presented. Three different nanofluids (Cu–water, TiO–water, and AL2O3–water) were studied.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.