40 citations · 89 across the 9 of their papers we have counts for
9 papers
Characterizing the Role of Hind Flippers in Hydrodynamics of A Harbor Seal
Amirhossein Fardi, Hamayun Farooq, Imran Akhtar +2
In this paper, we investigate the hydrodynamic characteristics of harbor seal locomotion, focusing on the role of hind flippers in thrust generation and wake dynamics. Through thre…
Physics-Informed Scaling Laws for the Performance of Pitching Foils in Schooling Configurations
Ahmet Gungor, Muhammad Saif Ullah Khalid, Arman Hemmati
This study introduces novel physics-based scaling laws to estimate the propulsive performance of synchronously pitching foils in various schooling configurations at Re=4000. These…
On the Association of Kinematics, Spanwise Instability and Growth of Secondary Vortex Structures in the Wake of Oscillating Foils
Suyash Verma, Muhammad Saif Ullah Khalid, Arman Hemmati
Three-dimensional wake of an oscillating foil with combined heaving and pitching motion is numerically evaluated at a range of chord-based Strouhal number (0.32 \le Stc \le 0.56) a…
On the association of secondary hairpin growth and surface pressure gradient for oscillating foils
Suyash Verma, Muhammad Saif Ullah Khalid, Arman Hemmati
The correspondence of secondary spanwise structures and pressure gradient is numerically evaluated for a foil, performing heaving and pitching motion, at a range of phase offsets (…
Momentum analysis of complex time-periodic flows
Benjamin R. S. Freeman, Robert J. Martinuzzi, Arman Hemmati
Several methods have been proposed to characterize the complex interactions in turbulent wakes, especially for flows with strong cyclic dynamics. This paper introduces the concept…
Classification of vortex patterns of oscillating foils in side-by-side configurations
Ahmet Gungor, Muhammad Saif Ullah Khalid, Arman Hemmati
The unsteady hydrodynamics of two in-phase pitching foils arranged in side-by-side (parallel) configurations is examined for a range of Strouhal number and separation distance. Thr…
On the Aerodynamics of Multistage Co-Axial Vertical-Axis Wind Turbines
Muhammad Saif Ullah Khalid, David Wood, Arman Hemmati
This study explored the aerodynamics of a new multi-stage co-axial vertical-axis wind turbine based on bio-inspiration from natural swimming habit of fish. The turbine was formed f…
How does altering synchronization of pitching parallel foils change their wake dynamics?
Ahmet Gungor, Muhammad Saif Ullah Khalid, Arman Hemmati
This study was inspired from the swimming habits of red nose tetra fish that prefer side-by-side configurations and exhibit changes to their synchronization mid-swimming. Using num…
Larger wavelengths suit the hydrodynamics of carangiform swimmers
Muhammad Saif Ullah Khalid, Junshi Wang, Imran Akhtar +3
The wavelength of undulatory kinematics of fish is an important parameter to determine their hydrodynamic performance. This study focuses on numerical examination of this feature b…