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 Copy

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

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.

Graduation Semester

2023-12

Type of Resource

Thesis

Copyright and License Information

Copyright 2023 Mohammad Alhussaini

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