62 citations · 144 across the 14 of their papers we have counts for
15 papers
A Fully Parallel Dual-Grid Immersed-Boundary Framework for Flow-Induced Sound from Complex Moving and Deforming Bodies
Amirhossein Fardi, Muhammad Saif Ullah Khalid
Predicting flow-induced sound from moving and deforming bodies is computationally demanding because the near-field hydrodynamics and the far-field acoustics require substantially d…
Optimized Fish Locomotion using Design-by-Morphing and Bayesian Optimization
Hamayun Farooq, Imran Akhtar, Muhammad Saif Ullah Khalid +1
Nature has always inspired scientists and engineers to understand the underlying mechanism leading to optimal design in bio-inspired dynamics. This study presents a computational f…
On the role of morphology and kinematics of biological swimmers to spread and suppress their odors in the wake
Maham Kamran, Amirhossein Fardi, Chengyu Li +1
Understanding the interplay between hydrodynamics and chemical sensing in aquatic environments is crucial for unraveling biological swimmers' navigation, foraging, and communicatio…
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…
How does vortex dynamics help undulating bodies spread odor?
Maham Kamran, Amirhossein Fardi, Chengyu Li +1
In this paper, we examine the coupling between odor dynamics and vortex dynamics around undulating bodies, with a focus on bio-inspired propulsion mechanisms. Utilizing computation…
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 (…
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…
Flow Transitions and Mapping for Undulating Swimmers
Muhammad Saif Ullah Khalid, Junshi Wang, Haibo Dong +1
Natural swimmers usually perform undulations to propel themselves and perform a range of maneuvers. These include various biological species ranging from micro-sized organisms to l…
Quantification of Flow Noise Produced by an Oscillating Foil
Muhammad Saif Ullah Khalid, Xiaoping Jiang, Imran Akhtar +1
Getting inspired from swimming natural species, a lot of research is being carried out in the field of unmanned underwater vehicles. During the last two decades, more emphasis on t…
Modeling the Aerodynamic Lift Produced by Oscillating Airfoils at Low Reynolds Number
Muhammad Saif Ullah Khalid, Imran Akhtar
For present study, setting Strouhal Number (St) as control parameter, numerical simulations for flow past oscillating NACA-0012 airfoil at 1,000 Reynolds Numbers (Re) are performed…