Numerical analysis of heat transfer in unsteady nanofluids in a small pipe with pulse pressure

6th International Conference on Manufacturing Engineering and Process

工业技术;物理学

Park, Cheol^1 ; Yu, Ki Tae^1 ; Song, Hee Geun^1 ; Kim, Sedong^1 ; Jeong, Hyomin^1

Department of Energy and Mechanical Engineering, Gyeongsang National University, Cheondaegukchi-Gil 38, Tongyeong, Gyeongnam

650-160, Korea, Republic of^1

关键词: Fraction concentrations;    Granular modeling;    Heat transfer rate;    Numerical experiments;    Numerical flow simulations;    Single phase fluids;    Two-phase model;    Uniform heat flux;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/885/1/012024/pdf
DOI  :  10.1088/1742-6596/885/1/012024

学科分类：工业工程学

来源: IOP

【 摘 要 】

In the present paper, developing turbulence forced convection flows were numerically investigated by using water-Al2O3 nano-fluid through a circular compact pipe which has 4.5mm diameter. Each model has a steady state and uniform heat flux(UHF) at the wall. The whole numerical experiments were processed under the RPM 100 to 500 and the nano-fluid models were made by the Alumina volume fraction. A single-phase fluid models were defined through nano-fluid physical and thermal properties calculations, Two-phase models(mixture granular model) were processed in 100nm diameter. The results show that comparison of nusselt number and heat transfer rate are improved as the Al2O3 volume fraction increased. All of the numerical flow simulations are processed by the FLUENT. The results show an increase from volume fraction concentration and an increase in heat transfer coefficient with increasing RPM.