Study of the Gas Pendulum Characteristic of Enclosure with Small Size

Abstract:

The flow and temperature fields caused by point heat source were obtained with the method of FEA (finite element analysis), and the pendulum characteristic of nature convection gas in two-dimensional enclosure with small size was validated and explained. The results are as follow: (1) Whether in horizontal status or in tilting status, under the function of buoyancy lift, the direction of nature convection gas always keeps vertical upwards in two-dimensional enclosure, and it has the pendulum characteristic.(2)The temperatures of two points on the same isotherm are no longer equal. When the tilt angle is 10°, the temperature difference is 20K; when the tilt angle is 20°, the temperature difference is 40K.The tilt angle can be measured by using this characteristic of MEMS airflow level posture sensor.

• Periodical: Applied Mechanics and Materials (Volumes 635-637)
• Pages: 782-785
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.635-637.782
• Online since: September 2014
• Authors: L.H. Piao*, Qi Rui Yang, J.J. Zhao
• Keywords: Finite Element Method (FEM), Gas Pendulum, Small Size, Stream Field, Temperature Field

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