T. Khatir^1,2, M. Bouchetara², K. Derrar², M. Djafri³, S. Khatir⁴, M. Abdel Wahab^5,6,*

CMC-Computers, Materials & Continua, Vol.72, No.2, pp. 2259-2273, 2022, DOI:10.32604/cmc.2022.020879

Abstract Braking efficiency is characterized by reduced braking time and distance, and therefore passenger safety depends on the design of the braking system. During the braking of a vehicle, the braking system must dissipate the kinetic energy by transforming it into heat energy. A too high temperature can lead to an almost total loss of braking efficiency. An excessive rise in brake temperature can also cause surface cracks extending to the outside edge of the drum friction surface. Heat transfer and temperature gradient, not to forget the vehicle's travel environment (high speed, heavy load, and steeply sloping road conditions), must thus… More >

Yafei Li, Yanjun Liu^*

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.3, pp. 775-788, 2022, DOI:10.32604/fdmp.2022.019810

Abstract A mathematical model for one-dimensional heat transfer in pipelines undergoing freezing induced by liquid nitrogen is elaborated. The basic premise of this technology is that the content within a pipeline is frozen to form a plug or two plugs at a position upstream and downstream from a location where work a modification or a repair must be executed. Based on the variable separation method, the present model aims to solve the related coupled heat conduction and moving-boundary phase change problem. An experiment with a 219 mm long pipe, where water was taken as the plugging agent, is presented to demonstrate… More >

ZHANG Hongta, GAO Jianling ^*, BAI Yuxing, ZHANG Yueqiang, WANG XiChun

The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 99-100, 2011, DOI:10.3970/icces.2011.017.099

Abstract This paper analyzes transient temperature field with plane elements of finite element method of lines. Finite element method of lines treats transient temperature field line, using a semi-discrete in space, in one direction discrete numerically and another direction with analytical type. Using backward time difference, finally ordinary differential equations are obtained, and solved by ordinary differential equations solver COLSYS. Verification indicates that plane element of Finite Element Method of Lines can obtain transient temperature field with higher precision and faster processing speed. More >