Effects of thermal radiation on natural convection in two connected circular cylinders suspended by NEPCM and porous media

被引:11
作者
Aly, Abdelraheem M. [1 ,2 ]
Alhejaili, Weaam [3 ]
机构
[1] King Khalid Univ, Fac Sci, Dept Math, Abha 62529, Aseer, Saudi Arabia
[2] South Valley Univ, Fac Sci, Dept Math, Qena, Egypt
[3] Princess Nourah Bint Abdulrahman Univ, Coll Sci, Dept Math Sci, POB 84428, Riyadh 11671, Saudi Arabia
关键词
Fractional derivative; ISPH; NEPCM; porous media; thermal radiation; PHASE-CHANGE MATERIALS; SMOOTHED PARTICLE HYDRODYNAMICS; HEAT-TRANSFER ENHANCEMENT; MIXED CONVECTION; ROTATING CYLINDER; MAGNETIC-FIELD; ISPH METHOD; CAVITY; NANOFLUID; SIMULATION;
D O I
10.1080/10407782.2022.2079331
中图分类号
O414.1 [热力学];
学科分类号
摘要
The natural convection of NEPCM was delivered in the dosed cavity constructed from two circular cylinders. The contributions of the NEPCM particles in heat transfer are achieved by the phase change. The partial differential equations that govern a nanofluid motion and heat transport are solved by a time fractional derivative of ISPH method. The impacts of the pertinent parameters, thermal radiation parameter Rd = 0 - 3, Rayleigh number Ra = 10(3) - 10(6), Darcy parameter Da = 10(-2) - 10(-5), Fusion temperature theta(f) = 0.05 - 0.8, length of a hot source L-Hot = 0.4 - 1, and fractional time-derivative alpha = 0.95 - 1 on the nanofluid flow and heat transfer are discussed. The main findings indicated that the Rayleigh number is representing a well role in improving the nanofluid movements and intensity of the temperature within the two circular cylinders. The phase change zone is reducing by an increase in Rayleigh number. The higher nanofluid speed and heat transfer are higher at the top cylinder compared to the bottom cylinder. Increasing the length of a hot source enhances the temperature strength within a cavity.
引用
收藏
页码:469 / 481
页数:13
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