Models for Interactions in Boundary Layers at Rotational Motions in Noncircular Orbits: The Concept for Teaching Science

Lena J-T Strömberg


The motions of a boomerang, a tennis ball with spin, and a flock of birds are studied with the assumption that, occasionally, capture into a noncircular orbit (NCO) is ruling the behavior. This approximation will be used in applications when the orbit is almost circular, but the angular velocity varies due to the interaction between orbital and sidereal motion. A format with decreasing radius is exploited, to model drop, due to spin. Collection and exchange by generalized conjugated forces from energy are extracted with a semi-derivative, which appears to give no loss, but only contributions.  It is proposed that the collection of energy in surrounding air layers of a certain shape may be beneficial for propulsion. Since the analyses were based on daily life conditions, this can be applied for a support media in teaching science.


Boomerang; Drop ball; Ionization frame; Semi-derivative; Spin; Tennis; The flock of birds

Full Text:



Eigel, M., and Sturm, K. (2018). Reproducing kernel Hilbert spaces and variable metric algorithms in PDE-constrained shape optimization. Optimization Methods and Software, 33(2), 268-296.

Smolarski, D. C., and Saylor, P. E. (1988). An optimum iterative method for solving any linear system with a square matrix. BIT Numerical Mathematics, 28(1), 163-178.

Strömberg, L. (2015). Observations for lateral light at a hole adjacent to lines of different colours comparison with the eye in terms of iris and blue make up analysis of monochromatic light. Journal of Scientific Research and Essays, 1(2), 28-32.

Tarasov, V. E. (2004). Fractional generalization of Liouville equations. Chaos: An Interdisciplinary Journal of Nonlinear Science, 14(1), 123-127.



  • There are currently no refbacks.

Copyright (c) 2022 Universitas Pendidikan Indonesia

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

View My Stats
ASEAN Journal of Science and Engineering Education (AJSEE) is published by Universitas Pendidikan Indonesia (UPI)