Singularity-Free Analytic Solution of Ballistic Trajectory with Quadratic Drag

Author(s):  
Dong-yeon Lee ◽  
Min-jae Tahk ◽  
Chang-hun Lee ◽  
Young-won Kim
2016 ◽  
Vol 49 (17) ◽  
pp. 40-45 ◽  
Author(s):  
Seungyeop Han ◽  
Min-Chul Hwang ◽  
Byung-Yoon Lee ◽  
Jaemyung Ahn ◽  
Min-Jea Tahk

2011 ◽  
Vol 34 (4) ◽  
pp. 748-754 ◽  
Author(s):  
Yang GUO ◽  
Xiang-De ZHANG ◽  
Xin-He XU

1989 ◽  
Vol 54 (4) ◽  
pp. 967-980 ◽  
Author(s):  
Ondřej Wein ◽  
Petr Kučera

Extended Leveque problem is studied for linear velocity profiles, vx(z) = u + qz. The existing analytic solution is reconsidered and shown to be inapplicable for the accurate calculation of mean mass-transfer coefficients. A numerical solution is reported and its accuracy is checked in detail. Simple but fairly accurate empirical formulas are suggested for the calculating of local and mean mass-transfer coefficients.


2021 ◽  
Vol 11 (7) ◽  
pp. 2903
Author(s):  
John Rasmussen ◽  
Mark de Zee

In this work, we develop and calibrate a model to represent the trajectory of a badminton shuttlecock and use it to investigate the influence of serve height in view of a new serve rule instated by the Badminton World Federation. The new rule means that all players must launch the shuttlecock below a height of 1.15 m, as opposed to the old rule whereby the required launch height was under the rib cage of the server. The model is based on a forward dynamics model of ballistic trajectory with drag, and it is calibrated with experimental data. The experiments also served to determine the actual influence of the new rule on the shuttlecock launch position. The model is used in a Monte Carlo simulation to determine the statistical influence of the new serve rules on the player’s ability to perform good serves; i.e., serves with little opportunity for the receiver to attack. We conclude that, for the female player in question, serving below a height of 1.15 m makes it marginally more difficult to perform excellent serves. We also conclude that there might be alternative launch positions that would be less likely to produce the best serves but could be exploited as a tactical option.


2011 ◽  
Vol 56 (1) ◽  
pp. 49-54 ◽  
Author(s):  
V. N. Popov ◽  
I. V. Testova ◽  
A. A. Yushkanov

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