Applications of an immersed boundary method on two-dimensional flows at low Reynolds numbers
Alhussaini, Mohammad Abdullah H
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https://hdl.handle.net/2142/122079
Description
Title
Applications of an immersed boundary method on two-dimensional flows at low Reynolds numbers
Author(s)
Alhussaini, Mohammad Abdullah H
Issue Date
2023-12-08
Director of Research (if dissertation) or Advisor (if thesis)
Bodony, Daniel J
Department of Study
Aerospace Engineering
Discipline
Aerospace Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Immersed Boundary Method
Ibm
Ibpm
Viscous Flow
Low Reynolds Number
Language
eng
Abstract
The goal of this work is to investigate the application of the immersed boundary projection method to moving and deforming bodies using the ViscousFlow numerical package [1]. A brief overview discussing the method is presented. Three cases of verification are performed for a stationary NACA0012 at Re = 1000, a sinusoidally plunging NACA0012 at Re = 1000, and a canonical pitch-hold-return flat plate maneuver at Re = 100. The results of the first and third cases were in rough agreement, while the sinusoidally plunging case captured the general frequency of the solution with a noticeable discrepancy. A deformation case with a NACA 4-digit airfoil changing thickness from NACA0006 to NACA0012 at zero angle of attack was also performed. The airfoil starts as a NACA0006 from convective time t = 0 to 5 /∞, where c is the chord and ∞ the freestream velocity. Then, the linear deformation occurs for t = 5 to 10. At t = 10, the airfoil is a NACA0012 and stays stationary until t = 15. In additional simulations, the effect of changing the deformation duration was changed to have duration times of 5, 3, and 1. This work is intended to serve as a base for future work involving investigating morphing shapes used in flow control.
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