In this article, the modeling and simulation of material removal during machining processes with a finite element method is discussed. The model links a dexel based material removal simulation with a thermomechanical finite element method to forecast thermical and process-related shape errors during machining processes. It is modeled mathematically by linking heat conduction equation with the d...

Multiphase flows in microchannels are encountered in a variety of microfluidic applications. Two-phase microchannel heat sinks leverage the latent heat of vaporization to offer an efficient method of dissipating large heat fluxes in a compact device. In microscale methanol-based fuel cells, the chemical reactions produce a twophase flow of methanol solution and carbon dioxide gas. Differences i...

Thermal manikins are valuable tools for quantitatively evaluating the performance of protective clothing ensembles and microclimate cooling systems. The goal of this investigation was to examine the performance of Coretech personal cooling systems, designed to reduce the effects of physiological and environmental heat stress, using a sweating thermal manikin. A sweating manikin takes into accou...

The attention of the present paper is focused on the intensive heat removal with arrays of impinging jets. Three jet configurations are tested which involve variation of geometric parameters such as nozzle shape, diameter and nozzle-tonozzle spacing and impingement distance and of flow rate. The convective heat transfer coefficient is measured with infrared thermography applied to the heatedthi...

Loop thermosyphon is a simple and reliable device providing several times higher heat transfer than convectional coolers used in cooling electronic. The paper deals with the cooling of power electronic component by means of this device. The main object of the paper is design and construction of the device to provide heat removal from the electronic component. Paper describes function principle ...

The present study determined whether a 5-day CO-Synch + controlled internal drug release (CIDR) protocol with two doses of PGF2α would improve timed artificial insemination (AI) pregnancy rate compared with 7-day CO-Synch + CIDR protocol in beef cows. Angus cross beef cows (N = 1817) at 12 locations were randomly assigned to 5-day CO-Synch + CIDR or 7-day CO-Synch + CIDR groups. All cows receiv...

Results and Conclusions: The results show that, brittle fracture is the dominant way for SiC ceramic’s removal mechanism, plastic deformation always exists during the drilling process. Brittle fracture includes cleavage fracture, transgranular fracture, intergranular fracture, material peeling off and grain boundary breakage; resintering and recrystallization happen under the joint action of gr...

Pretreatments of low-solids potato process effluent were tested for their potential to increase surfactin yield. Pretreatments included heat, removal of starch particulates, and acid hydrolysis. Elimination of contaminating vegetative cells was necessary for surfactin production. After autoclaving, 0.40 g/L of surfactin was produced from the effluent in 72 h, vs 0.24 g/L in the purified potato ...

Abstract This paper investigates in-situ thermographic imaging of a CMP pad during polish to extract spatial endpoint uniformity and polish rate uniformity across the wafer. IR images of the pad contain subtle temperature gradients masked by noise, making endpoint detection difficult. Also effects such as slurry flow, head oscillation, camera angle, and a baseline temperature increase in the pa...

Solar Desalination In article number 2300189, Lin Li and co-workers present a Janus ion-selective hydrogel interfacial evaporator, which enables ion-electromigration salt removal. The from-scratch salt-removal route breaks the limitations of conventional water-convection enhanced routes, significantly lowers heat loss, achieving record-high evaporation rate holding great promise for future sola...