The numerical modelling of mixing phenomena of nanofluids in passive micromixers

International Conference on Applied Sciences 2017

Milotin, R.^1 ; Lelea, D.^1

Politehnica University of Timisoara, Department for Mechanical Machines, Department of Equipment and Transportation, B-dul Mihai Viteazu 1, Timisoara

300223, Romania^1

关键词: Commercial packages;    Conservation of momentum;    Flow instabilities;    Fluid temperatures;    Mixing index;    Mixing process;    Rapid mixing;    Software ANSYS;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/294/1/012011/pdf
DOI  :  10.1088/1757-899X/294/1/012011

来源: IOP

【 摘 要 】

The paper deals with the rapid mixing phenomena in micro-mixing devices with four tangential injections and converging tube, considering nanoparticles and water as the base fluid. Several parameters like Reynolds number (Re = 6 - 284) or fluid temperature are considered in order to optimize the process and obtain fundamental insight in mixing phenomena. The set of partial differential equations is considered based on conservation of momentum and species. Commercial package software Ansys-Fluent is used for solution of differential equations, based on a finite volume method. The results reveal that mixing index and mixing process is strongly dependent both on Reynolds number and heat flux. Moreover there is a certain Reynolds number when flow instabilities are generated that intensify the mixing process due to the tangential injections of the fluids.