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General Observations of the Time-Dependent Flow Field Around Flat Plates in Free Fall

[+] Author Affiliations
Jakob Hærvig, Anna Lyhne Jensen, Henrik Sørensen

Aalborg University, Aalborg, Denmark

Marie Cecilie Pedersen

Vattenfall Vindkraft A/S, Frederica, Denmark

Paper No. AJKFluids2015-12708, pp. V001T12A001; 6 pages
doi:10.1115/AJKFluids2015-12708
From:
  • ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
  • Volume 1: Symposia
  • Seoul, South Korea, July 26–31, 2015
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5721-2
  • Copyright © 2015 by ASME

abstract

The free fall trajectories of flat plates are investigated in order to improve understanding of the forces acting on falling blunt objects. The long term goal is to develop a general applicable model to predict free fall trajectories. Numerically the free fall of a flat plate is investigated using a six degrees of freedom (6DOF) solver and a dynamic mesh. To validate the simulation, the trajectories of aluminium plates falling in water are recorded by digital camera recordings and compared to the simulation. The simulation is able to calculate the motion of the plate within each time step with high accuracy, and thereby allowing the whole trajectory to be predicted with fair accuracy.

With the numerical model able to predict the free fall and the complex plate fluid interactions, fluids forces can be extracted for model development in future studies.

Copyright © 2015 by ASME

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