Unsteady free convection flow past a semi-infinite vertical plate with constant heat flux in water based nanofluids

International Conference on Innovative Technology, Engineering and Sciences 2018

工业技术;自然科学

Narahari, Marneni^1

Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar

32610, Malaysia^1

关键词: Crank-Nicolson scheme;    Finite-difference techniques;    Free convective flow;    Local Nusselt number;    Local skin friction;    Solid volume fraction;    TiO2 nano-particles;    Unsteady free convection;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/342/1/012085/pdf
DOI  :  10.1088/1757-899X/342/1/012085

来源: IOP

【 摘 要 】

The unsteady free convective flow of nanofluids past a semi-infinite vertical plate with uniform heat flux has been investigated numerically. An implicit finite difference technique of Crank-Nicolson scheme has been employed to solve the governing partial differential equations. Five different types of water based nanofluids containing Cu, Ag, Al2O3, CuO and TiO2nanoparticles are considered to study the fluid flow characteristics with various time and solid volume fraction parameters. It is found that the local as well as the average Nusselt number for nanofluids is higher than the pure fluid (water). The local skin-friction is higher for pure fluid as compared to the nanofluids. The present numerical results obtained for local Nusselt number are validated with the previously published correlation results for a limiting case and it is found that the results are in good agreement.