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Articles 31 - 35 of 35
Full-Text Articles in Engineering
Dynamic Optical Absorption Characteristic Of Human Blood In Visible- And Near-Infrared Light With Variable Temperature, Wenjuan Wu, Dong Li, Guo-Xiang Wang, Yueshe Wang, Bin Chen
Dynamic Optical Absorption Characteristic Of Human Blood In Visible- And Near-Infrared Light With Variable Temperature, Wenjuan Wu, Dong Li, Guo-Xiang Wang, Yueshe Wang, Bin Chen
Dr. Guo-Xiang Wang
No abstract provided.
Three-Dimensional Flow Of Solution In An Industry-Size Hydrothermal Autoclave Subjected To Non-Uniform Heating Effects Of A Baffle On Flow And Temperature Separation, Hongmin Li, Guo-Xiang Wang, Edward Evans
Three-Dimensional Flow Of Solution In An Industry-Size Hydrothermal Autoclave Subjected To Non-Uniform Heating Effects Of A Baffle On Flow And Temperature Separation, Hongmin Li, Guo-Xiang Wang, Edward Evans
Dr. Guo-Xiang Wang
Hydrothermal growth takes place in a closed cylindrical container called an autoclave. Natural convection flow of an aqueous solution at a high temperature and a high pressure carries the nutrient. The high temperature growth condition and the natural convection flow are maintained by two independently controlled electrical heaters on the outside of the autoclave. In practice, the heating is circumferentially non-uniform. Many theoretical and numerical studies, however, assume axially symmetric heating conditions. This paper presents a numerical analysis of the three-dimensional heat transfer and fluid flow with a non-uniform heating condition. The analysis is based on an industry-size autoclave with …
An Experimental Study On Pulsed Spray Cooling With Refrigerant R-404a In Laser Surgery, Zhifu Zhou, Bin Chen, Yueshe Wang, Liejin Guo, Guo-Xiang Wang
An Experimental Study On Pulsed Spray Cooling With Refrigerant R-404a In Laser Surgery, Zhifu Zhou, Bin Chen, Yueshe Wang, Liejin Guo, Guo-Xiang Wang
Dr. Guo-Xiang Wang
With a low boiling point (−45.5 °C at 1 atm) and high volatility, cryogen R-404a has the potential to replace current R-134a (−26.1 °C at 1 atm) for improved therapeutic outcome of dark skins in cutaneous laser treatment. This paper presents an experimental study on pulse spray cooling with cryogen R-404a including the spray characteristics and the resulting dynamic cooling of a solid surface. The spray system includes a special designed pressure nozzle (with the tube diameter less than 1 mm) that is connected to a fast response electric valve which can open or close within 5 ms. A high-speed …
Experimental Study On The Vascular Thermal Response To Visible Laser Pulses, D. Li, B. Chen, W. Wu, Guo-Xiang Wang, Y. He, Z. Ying
Experimental Study On The Vascular Thermal Response To Visible Laser Pulses, D. Li, B. Chen, W. Wu, Guo-Xiang Wang, Y. He, Z. Ying
Dr. Guo-Xiang Wang
Port-wine stains (PWSs) are congenital vascular malformations that progressively darken and thicken with age, and laser therapy is the most effective in clinical practice. Using dorsal skin chamber (DSC), this study evaluated thermal response of blood vessel to a 595-nm pulsed dye laser (PDL) with controlled energy doses and pulse durations. Totally, 32 vessels (30∼300 μm in diameter) are selected from the dorsal skin of the mouse to match those in port-wine stain. The experimental results showed that the thermal response of the blood vessels to laser irradiation can be recognized as coagulation, constriction with diameter decrease, disappearance (complete constriction), …
An Experimental Study On The Spray And Thermal Characteristics Of R134a Two-Phase Flashing Spray, Zhou Zhifu, Wu Weitao, Chen Bin, Guo-Xiang Wang, Guo Liejin
An Experimental Study On The Spray And Thermal Characteristics Of R134a Two-Phase Flashing Spray, Zhou Zhifu, Wu Weitao, Chen Bin, Guo-Xiang Wang, Guo Liejin
Dr. Guo-Xiang Wang
Flashing spray of volatile liquids is a common phenomenon observed in many industrial applications such as fuel injection of engines, accidental release of flammable and toxic pressure-liquefied gases, failure of a vessel or pipe in the form of a small hole in chemical industry, and cryogenic spray cooling in laser dermatology, etc. In flashing spray, the volatile liquid is depressurized rapidly at the exit of a nozzle (or a hole in a vessel) and becomes superheated. Such superheated liquid (in the form of either a jet or droplets) will lead to explosive atomization with fine droplet and a short spray …