The relative contribution to the radiometric force of the area and perimeter of the vane is studied experimentally and numerically. Experimentally, a circle, a low-aspect rectangle, and a high-aspect rectangle were all tested on a thrust measurement stand with nano-Newton resolution placed in a stagnant gas. The computational results were obtained through 2-D simulations using the direct simulation Monte Carlo method, as well as a discrete ordinate solution of the ...
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