The technology of micro heat pipe cooled reactor: A review

Biomedical aspects of entropy generation on MHD flow of TiO2-Ag/blood hybrid nanofluid in a porous cylinder

This study aims to analyze the heat transfer behavior of the magnetohydrodynamic blood-based Casson hybrid nanofluid in the occurrence of a non-Fourier heat flux model and linear thermal radiation over a horizontal porous stretching cylinder with potential applications in biomedical engineering. The present investigation utilised titanium dioxide and silver nanoparticles, which exhibit considerable potential in the realm of cancer therapy. Thus, there is a growing interest among biomedical engineers and clinicians in the study of entropy production as a means of quantifying energy dissipation in biological systems. Suitable self-similarity variables are employed to transform the nonlinear mathematical equations such as velocity, temperature, skin friction coefficient, and heat transfer rate, which are computed via homotopy perturbation method (HPM). HPM computations have been executed to solve the influences of various parameters such as porosity parameter ( K = 0.0 , 1.0 , 2.0 ) , Curvature parameter ( α = 0.0 , 1.0 , 3.0 , 5.0 ) , Casson parameter ( β = 0.0 , 0.5 , 1.5 ) , inertia coefficient ( Fr = 0.5 , 1.5 , 2.5 ) , thermal relaxation parameter ( δ ∗ = 0.0 , 0.5 , 1.0 ) , radiation ( Rd = 0.0 , 0.5 , 1.0 ) , Eckert number ( Ec = 0.0 , 0.1 , 0.2 ) , Brinkman number ( Br = 0.5 , 1.0 , 1.5 ) and temperature difference parameter ( α 1 = 0.0 , 0.5 , 1.0 ) . The comparison using the homotopy perturbation technique produces a more accurate and reliable consequence than the numerical method (Runge-Kutta method). The higher values of the Casson and Curvature parameters decrease the velocity profile. The temperature profile of M = 1 and M = 0 increases with improving values of the thermal relaxation parameter. Entropy generation rises to enhance Brinkman number values, whereas Bejan number exhibits the reverse influence. Improving the value of the heat source parameter declines the Nusselt number.

Molecular Dynamics Study on the Wettability of the Lithium Droplet and Tungsten Surface

In this paper, molecular dynamics (MD) simulation was used to study the wettability of lithium and tungsten. The surface energy barrier and evaporation control the static contact angle with increasing temperature. The effects of 4 different sizes of droplets and 10 different tungsten sections were evaluated. Moreover, it was found that the different arrangements of atoms on the solid surface will affect the wettability, but the size of the droplet has little effect. In addition, the situation of the droplets driven by six different external forces was evaluated. When the force increases, the two states of the droplet and stream will have different properties. Finally, we studied the phase behavior between lithium and tungsten. For example, lithium overflows from the tungsten plate. The tungsten phase is separated in the lithium plate. Lithium is faster than tungsten when it aggregates in the gas phase, and wettability will drive the effects of engulfing and spitting.