Abstract
We investigated the concept of creating a gas radial flow by employing the molecular drag effect upon gas molecules on rotating disks. All the gas molecules have a circumferential velocity rω (r: distance from the rotating axis, and ω: angular velocity) each time they leave a surface of the rotating disks. As a result, the gas molecules between the rotating disks tend on average to move outward from the center. That is, a radial flow appears. This idea was demonstrated by Monte Carlo simulation of 2 types of rotating disks (flat and corrugated ones). Pumping efficiency was clearly demonstrated for both types of disks when the velocity ratio rω/ ( : mean velocity) became larger than 1.
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