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Month: June 2022

Optimal thrust efficiency for a tandem wing in forward flight using varied hindwing kinematics of a damselfly

Optimal thrust efficiency for a tandem wing in forward flight using varied hindwing kinematics of a damselfly

Physics of Fluids, Volume 34, Issue 6, June 2022. We reveal the hindwing kinematics of a damselfly that are optimal for the thrust efficiency, which is a major concern of a bio-inspired micro-aerial vehicle. The parameters of the hindwing kinematics in…

Fermi acceleration in rotating drums

Fermi acceleration in rotating drums

Journal of Mathematical Physics, Volume 63, Issue 6, June 2022. Consider hard balls in a bounded rotating drum. If there is no gravitation, then there is no Fermi acceleration, i.e., the energy of the balls remains bounded forever. If there is gravitat…