期刊
ENTROPY
卷 19, 期 12, 页码 -出版社
MDPI AG
DOI: 10.3390/e19120690
关键词
entropy generation; microreactors; double diffusion forced convection; nanofluid; radiative heat transfer
资金
- Erasmus programme
- University of Glasgow through EPSRC DTA [EP/M506539/1]
- EPSRC [EP/N020472/1]
- Engineering and Physical Sciences Research Council [1651496, EP/N020472/1] Funding Source: researchfish
- EPSRC [1651496, EP/N020472/1, EP/M506539/1] Funding Source: UKRI
This paper presents a theoretical investigation of the second law performance of double diffusive forced convection in microreactors with the inclusion of nanofluid and radiation effects. The investigated microreactors consist of a single microchannel, fully filled by a porous medium. The transport of heat and mass are analysed by including the thick walls and a first order, catalytic chemical reaction on the internal surfaces of the microchannel. Two sets of thermal boundary conditions are considered on the external surfaces of the microchannel; (1) constant temperature and (2) constant heat flux boundary condition on the lower wall and convective boundary condition on the upper wall. The local thermal non-equilibrium approach is taken to thermally analyse the porous section of the system. The mass dispersion equation is coupled with the transport of heat in the nanofluid flow through consideration of Soret effect. The problem is analytically solved and illustrations of the temperature fields, Nusselt number, total entropy generation rate and performance evaluation criterion (PEC) are provided. It is shown that the radiation effect tends to modify the thermal behaviour within the porous section of the system. The radiation parameter also reduces the overall temperature of the system. It is further demonstrated that, expectedly, the nanoparticles reduce the temperature of the system and increase the Nusselt number. The total entropy generation rate and consequently PEC shows a strong relation with radiation parameter and volumetric concentration of nanoparticles.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据