Acoustic waves-and ultrasound waves in particular-are biocompatible,with excellent transmission through biological tissues.Furthermore,the wavelength and intensity of acoustic waves can be tuned over several orders of...Acoustic waves-and ultrasound waves in particular-are biocompatible,with excellent transmission through biological tissues.Furthermore,the wavelength and intensity of acoustic waves can be tuned over several orders of magnitude.Most notably,the commonly used 10–300 MHz frequency range is attractive for biomedical applications,as its wavelength in water(5–150μm)corresponds to the cellular-length scale.展开更多
Based on the assumption of locally fully developed flow and slip-fiow theory, we preseota method to simulate the heat transfer and momentum exchange of gas with a solid surfacein micro-channels, and the method was pro...Based on the assumption of locally fully developed flow and slip-fiow theory, we preseota method to simulate the heat transfer and momentum exchange of gas with a solid surfacein micro-channels, and the method was proved by comparing with Pfahler’s exprimentalresults. Effect of the gas compressiblity and slip-flow on the skin friction was discussed indetail, the result demonstrates that Knudsen number should be considered in the analysisof flow in micro-domains. In the second part, the temperaturedump theory was studiedto explain the abnormal phenomina which is different from that of macro-scale channels.Some important conclusions of momentum and heat transports in microscale channels wereobtained.展开更多
基金supported in part by the European Research Council under the ERC Advanced Grant Agreement HOLOMAN(788296)the Max Planck Societysupport from the Alexander von Humboldt Foundation。
文摘Acoustic waves-and ultrasound waves in particular-are biocompatible,with excellent transmission through biological tissues.Furthermore,the wavelength and intensity of acoustic waves can be tuned over several orders of magnitude.Most notably,the commonly used 10–300 MHz frequency range is attractive for biomedical applications,as its wavelength in water(5–150μm)corresponds to the cellular-length scale.
文摘Based on the assumption of locally fully developed flow and slip-fiow theory, we preseota method to simulate the heat transfer and momentum exchange of gas with a solid surfacein micro-channels, and the method was proved by comparing with Pfahler’s exprimentalresults. Effect of the gas compressiblity and slip-flow on the skin friction was discussed indetail, the result demonstrates that Knudsen number should be considered in the analysisof flow in micro-domains. In the second part, the temperaturedump theory was studiedto explain the abnormal phenomina which is different from that of macro-scale channels.Some important conclusions of momentum and heat transports in microscale channels wereobtained.
