Effect of the Layout of Heat Sources on the Convection of Nanofluid in a Square

• Main Authors: Yu-Chen Chu, 褚育辰
• Other Authors: Tsan-Hui Hsu
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/48877192711132738845

碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 100 === Natural convection in a square enclosure with heat source at various locations was studied numerically. The well-known CFD software FLUENT package combined with Gambit was used for simulation. The system considered including change of the location of heat source on the bottom wall. The fluid adopted in the enclosure is nanofluid with different concentration of nanoparticle, various material of nanoparticle(2%、4%、6%). The governing parameter Ra (105~107)affecting the convection heat transfer is investigated as well. The numerical results are displayed and discussed with stramlines, temperature distributions, and Local Nusselt Number. It is found the heat transfer quantity transported by fluid saturated with nanoparticle is larger. The material and concentration of nanoparticle influence the convection heat transfer in the enclosure significantly.the results show that the different heat source positionto follow the change of the flow in entire cavity,three kinds of nanoparticle TiO2 is bad,lncreasing solid volume fraction(φ) that the Nusselt number has been raised