15 citations · 40 across the 10 of their papers we have counts for
10 papers
Is No-Slip Necessary for Vorticity Generation and Shedding over a Circular Cylinder?
Kourosh Jafari Ghalejooghi, Haithem E. Taha
It is traditionally believed that the no-slip boundary condition is necessary for vorticity generation, as might be implied by the Lighthill vorticity generation mechanism. However…
A Response to "Application of Gauss's Principle to the Classical Airfoil Lift Problem"
Haithem Taha
The classical theory of lift is confined to sharp edged airfoils. The search for a more general closure condition in potential flow remained elusive for over a century. Recently, a…
Vortex Dynamics: A Variational Approach Using the Principle of Least Action
Nabil M. Khalifa, Haithem E. Taha
The study of vortex dynamics using a variational formulation has an extensive history and a rich literature. The standard Hamiltonian function that describes the dynamics of intera…
Thrust Enhancement and Degradation Mechanisms due to Self-Induced Vibrations in Bio-inspired Flying Robots
Dipan Deb, Kevin Huang, Aakash Verma +2
Whenever a flapping robot moves along a trajectory it experiences some vibration about its mean path. Even for a hovering case, a flier experiences such vibration due to the oscill…
Singularly Perturbed Averaging with Application to Bio-Inspired 3D Source Seeking
Mahmoud Abdelgalil, Asmaa Eldesoukey, Haithem Taha
We analyze a class of singularly perturbed high-amplitude, high-frequency oscillatory systems that arises in extremum seeking applications. We provide explicit formulas for averagi…
Recursive Averaging with Application to Bio-Inspired 3D Source Seeking
Mahmoud Abdelgalil, Haithem Taha
We analyze a class of high-amplitude, high-frequency oscillatory systems in which periodicity occurs on two distinct time scales and establish the convergence of its trajectories t…
What Does Nature Minimize In Every Incompressible Flow?
Haithem E. Taha, Cody Gonzalez
In this paper, we discover the fundamental quantity that Nature minimizes in almost all flows encountered in everyday life: river, rain, flow in a pipe, blood flow, airflow over an…
Sea urchin sperm exploit extremum seeking control to find the egg
Mahmoud Abdelgalil, Yasser Aboelkassem, Haithem Taha
Sperm cells perform extremely demanding tasks with minimal capabilities. The cells must quickly navigate in a noisy environment to find an egg within a short time window for succes…
A Variational Theory of Lift
Cody Gonzalez, Haithem E. Taha
In this paper, we revive a special, less-common, variational principle in analytical mechanics (Hertz' principle of least curvature) to develop a novel variational analogue of Eule…
Lie Bracket Approximation-Based Extremum Seeking with Vanishing Input Oscillations
Mahmoud Abdelgalil, Haithem Taha
In recent years, an approach to extremum seeking control made it possible to design control vector fields that lead to asymptotic stability of the minimum point provided that the m…