MS Proposal: Isabel Fernandez

Thu Jan 13 2022 10:00 AM
Weber 200 & Microsoft Teams
Evaluation of Boundary Condition Treatments for Complex Geometries in Lattice-Boltzmann Flow Simulations

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Master's Proposal

 

Isabel Fernandez

(Advisor: Prof. Juergen Rauleder)

 

"Evaluation of Boundary Condition Treatments for Complex Geometries in Lattice-Boltzmann Flow Simulations"

 

 

Thursday, January 13
10:00 a.m.
Weber 200

Microsoft Teams: https://teams.microsoft.com/l/meetup-join/19%3ameeting_MmU2YjQ1YTEtY2I5MS00OWMwLTliNTItZjlhYTJiMGExZmZj%40thread.v2/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%22aa047c8f-5024-4266-af98-3d51c332348d%22%7d
 

Abstract:
This study aims to implement and assess different boundary conditions in the Lattice-Boltzmann method as they are applied to more complex geometric shapes. The Lattice-Boltzmann Method is currently being explored as an alternative flow solver for use in high-speed or real-time applications like pilot flight simulators. The Lattice Boltzmann framework used in this study is a GPU accelerated version of the OpenLB C++ library, a highly parallelizable program that allows for increased computational speed. The LBM models fluid domain as a set of square lattices aligned to a Cartesian grid. While this allows for a much more computationally efficient analysis, this can result in challenges when modeling solid structures within the fluid flow, as the objects are often represented with a staircase approximation, requiring a high resolution to represent curved features. Different boundary conditions that account for curved geometry are implemented in the current Lattice-Boltzmann framework and different near-body flow parameters are evaluated for complex geometric shapes. This study compares simple bounce-back boundary conditions, an extrapolation method for curved surfaces proposed by Filippova and Hanel and improved upon by Mei, Luo, and Shyy (MLS), an interpolated bounce-back method proposed by Bouzidi, Firdaouss, and Lallemand (BFL), and a unified interpolated bounce-back method proposed by Yu, Mei, and Shyy (YMS). These methods were implemented using both no-slip/non-moving wall assumptions and moving-wall/slip assumptions.

Committee:

  • Prof. Juergen Rauleder – School of Aerospace Engineering (advisor)
  • Prof. Marilyn Smith – School of Aerospace Engineering
  • Prof. Lakshmi Sankar– School of Aerospace Engineering

 

Location

Weber 200 & Microsoft Teams