Abstract
Development of modern electronic devices demands a creation of effective cooling systems in the form of active or passive nature. More optimal technique for an origination of such cooling arrangement is a mathematical simulation taking into account the major physical processes which define the considered phenomena. Thermogravitational convection in a partially open alumina-water nanoliquid region under the impacts of constant heat generation element and heat-conducting solid wall is analyzed numerically. A solid heat-conducting wall is a left vertical wall cooled from outside, while a local solid element is placed on the base and kept at constant volumetric heat generation. The right border is supposed to be partially open in order to cool the local heater. The considered domain of interest is an electronic cabinet, while the heat-generating element is an electronic chip. Partial differential equations of mathematical physics formulated in non-primitive variables are worked out by the second order finite difference method. Influences of the Rayleigh number, heat-transfer capacity ratio, location of the local heater and nanoparticles volume fraction on liquid circulation and thermal transmission are investigated. It was ascertained that an inclusion of nanosized alumina particles to the base liquid can lead to the average heater temperature decreasing, that depends on the heater location and internal volumetric heat generation. Therefore, an inclusion of nanoparticles inside the host liquid can essentially intensify the heat removal from the heater that is the major challenge in different engineering applications. Moreover, an effect of nanosized alumina particles is more essential in the case of low intensive convective flow and when the heater is placed near the cooling wall.
Highlights
Convective thermal transmission in partially open cavities with solid heat-conducting walls and heat-generating elements is very important in different engineering supplements, e.g., cooling of electronics, heat-transfer devices, chemical apparatus and solar collectors
Optimal approach for solution to this problem is an employment of computer power of modern computational systems
Different interesting and useful theoretical and experimental data have been announced during last decades
Summary
Convective thermal transmission in partially open cavities with solid heat-conducting walls and heat-generating elements is very important in different engineering supplements, e.g., cooling of electronics, heat-transfer devices, chemical apparatus and solar collectors. It should be noted that nowadays one of the major challenges is a creation of effective cooling system for reducing the working temperature for heat-generating elements inside different electronic cabinets. Singh and S.N. Singh [1] examined numerically 2D conjugate free convection-radiation heat transfer in an open air domain under the influence of uniform volumetric heat generating element on the vertical border. Singh [1] examined numerically 2D conjugate free convection-radiation heat transfer in an open air domain under the influence of uniform volumetric heat generating element on the vertical border They used Hottel’s Crossed-string technique for calculation of view factors during the surface radiation analysis. Taking into account the obtained results, correlations were derived for maximum dimensionless heater temperature for various positions
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call