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Full-Text Articles in Mechanical Engineering
Numerical And Experimental Analysis Of Droplet Impact, Deformation And Formation Of Droplet Train, Muhammad Hasan, Morteza Vatani, Yanfeng Lu, Ho-Chan Kim, Jae-Won Choi
Numerical And Experimental Analysis Of Droplet Impact, Deformation And Formation Of Droplet Train, Muhammad Hasan, Morteza Vatani, Yanfeng Lu, Ho-Chan Kim, Jae-Won Choi
Dr. Jae-Won Choi
Numerical analysis for a two dimensional case of two–phase fluid flow has been performed to investigate droplet impact, deformation for a droplet train. The purpose of this investigation is to study the phenomenon of liquid droplet impact on a liquid film created by a flattened droplet and the consequent deformation of the film while merging and advancing of the moving front of the film, during the manufacturing processes with jetting technology such as a direct printing process and inkjet printing. This investigation focuses on the analysis of interface tracking and the change of shape for an impacted droplet of a …
Numerical Analysis Of Rapid Micromixers Utilizing Magnetic Particles, Yiou Wang, Jiang Zhe, Benjamin Chung, Prashanta Dutta
Numerical Analysis Of Rapid Micromixers Utilizing Magnetic Particles, Yiou Wang, Jiang Zhe, Benjamin Chung, Prashanta Dutta
Dr. Jiang Zhe
No abstract provided.
Prediction Of Evaporation Heat Transfer Coefficient Based On Gas-Liquid Two-Phase Annular Flow Regime In Horizontal Microfin Tubes,, Yueshe Wang, Yanling Wang, Guo-Xiang Wang, Hiroshi Honda
Prediction Of Evaporation Heat Transfer Coefficient Based On Gas-Liquid Two-Phase Annular Flow Regime In Horizontal Microfin Tubes,, Yueshe Wang, Yanling Wang, Guo-Xiang Wang, Hiroshi Honda
Dr. Guo-Xiang Wang
A physical model of gas–liquid two-phase annular flow regime is presented for predicting the enhanced evaporation heat transfer characteristics in horizontal microfin tubes. The model is based on the equivalence of a periodical distortion of the disturbance wave in the substrate layer. Corresponding to the stratified flow model proposed previously by authors, the dimensionless quantity Fr0 = G/[gdeρv(ρl − ρv)]0.5 may be used as a measure for determining the applicability of the present theoretical model, which was used to restrict the transition boundary between the stratified-wavy flow and …
Numerical Analysis Of Cold Injury Of Skin In Cryogen Spray Cooling For Laser Dermatologic Surgery, Dong Li, Bin Chen, Wen-Juan Wu, Ya-Ling He, Lin Xing, Guo-Xiang Wang
Numerical Analysis Of Cold Injury Of Skin In Cryogen Spray Cooling For Laser Dermatologic Surgery, Dong Li, Bin Chen, Wen-Juan Wu, Ya-Ling He, Lin Xing, Guo-Xiang Wang
Dr. Guo-Xiang Wang
In laser dermatologic surgery, cryogen spray cooling (CSC) is used to avoid unwanted thermal damage such as scars from skin burning due to the melanin absorption of the laser beam. As the cryogen is fully atomized from the nozzle, temperature of the droplets can quickly drop below -60 oC because of evaporation. Such low temperature may lead to cold injury of skin. Therefore, spray cooling process should be accurately controlled during clinical practice to achieve sufficient protection and avoid cold injury. This study presents a numerical analysis for cold injury of skin in cryogen spray cooling for dermatologic laser surgery …
Stability Analysis Of A Rough Journal Bearing Considering Cavitation Effects, T.V.V.L. Rao, Jerzy Sawicki
Stability Analysis Of A Rough Journal Bearing Considering Cavitation Effects, T.V.V.L. Rao, Jerzy Sawicki
Jerzy T. Sawicki
A modified governing equation is derived incorporating the effects of roughness and cavitation in a journal bearing. The available theories of Reynolds roughness and cavitation algorithm proposed by Elrod are utilized in this work to develop a numerical procedure for stability analysis of a liquid lubricated rough journal bearing. The Elrod generalized theory of Reynolds roughness provides a governing equation based on the surface configuration. The Elrod cavitation algorithm conserves mass throughout the bearing and automatically predicts the full film and cavitation regions using a switch function. The roughness is considered on either or both the bearing and journal surfaces. …