Understanding the connection between physiology and kinematics of natural swimmers is great importance to design efficient bio-inspired underwater vehicles. This study looks at high-fidelity three-dimensional numerical simulations for flows over an undulating American eel with prescribed anguilliform kinematics. Particularly, our work focuses on why employ wavelengths shorter than their bodylengths while performing wavy For this purpose, we vary undulatory wavelength a range values generally...

Unfolding the connection between kinematics and physiology of natural swimming species is much value for bioinspired designs autonomous underwater vehicles. Extensive numerical investigations find which wavelength undulating motion carangiform anguilliform swimmers suitable to maximize their performance in terms thrust production efficiency under different flow conditions. It also explained how jet switching wake a swimmer deteriorates hydrodynamic swimmers.

The adoption of Islamic Mobile Banking (IMB) services remains a challenge in Pakistan, despite the increasing global growth banking. Shariah compliance, security concerns, and trust issues significantly impact acceptance IMB services. This study integrates Unified Theory Acceptance Use Technology (UTAUT) with compliance to explore key factors influencing consumer adoption. Previous research suggests that regulatory confidence performance expectancy play pivotal role technology (Venkatesh et...

The wavelength of undulatory kinematics fish is an important parameter to determine their hydrodynamic performance. This study focuses on numerical examination this feature by reconstructing the real physiological model and steadily swimmning Jack Fish. We perform three-dimensional simulations for flows over these models composed trunk, dorsal, anal, caudal fins. Moreover, we prescribe carangiform-like motion its undulation a range wavelengths. Undulation with larger wavelengths improves...

Numerical simulations have been used to analyze the equivalence of pitching and plunging motions found in a flapping NACA0012 airfoil. Two-dimensional incompressible Navier–Stokes equations are solved at Reynolds number 10 3 over range Strouhal numbers. A novel criterion based on is proposed which provides using length scale traversed by trailing edge each case. Aerodynamic coefficients match well for both kinematics temporal as spectral domains. Detailed analysis contribution different...

The unsteady hydrodynamics of two pitching foils arranged in a side-by-side (parallel) configuration is examined for range Strouhal numbers, phase differences, oscillation amplitudes and separation distances. Three distinct vortex patterns are identified the wake maps, which include separated wake, merged transitional-merged wake. Furthermore, novel model introduced based on fundamental flow variables including velocity, location circulation dipole structures to quantitatively distinguish...

Three-dimensional wake of an oscillating foil with combined heaving and pitching motion is numerically evaluated at a range chord-based Strouhal number ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mn>0.32</mml:mn><mml:mo>≤</mml:mo><mml:msub><mml:mrow><mml:mi>S</mml:mi><mml:mi>t</mml:mi></mml:mrow><mml:mi>c</mml:mi></mml:msub><mml:mo>≤</mml:mo><mml:mn>0.56</mml:mn></mml:math> ) phase offset...

Flow separation in airfoils have been extensively studied to analyze the underlying physics of phenomenon. The phenomenon being nonlinear requires tools reveal various features involving stall, bifurcation, and transition chaos. In this study, we perform numerical simulations flow past a symmetric airfoil (NACA-0012) at 1,000 Reynolds number compute aerodynamic forces different angles attack (α). time histories spectral analysis important behavior around airfoil. We find that steady state...

Aquatic unmanned vehicles (AUVs) are making a shift to more efficient swimming designs inspired from nature that utilize flexible materials make the system mimetic. Creating mimetic body caudal fin AUV means aquatic locomotion is achieved through an oscillatory undulation. This motion can be modeled as spatio-temporal function by replicating behavior of spinal flexion. A computational fluid dynamic analysis determined frequency which produces enough thrust overcome drag greater than 2.5 Hz....

The evolution of the secondary vortex arrangement around a foil, performing heaving and pitching motion, is numerically examined for range phase offsets (90 °≤ϕ≤ 270°) reduced frequency (0.32 ≤Stc≤ 0.56), at Reynolds number 8000. wake dominated by two distinct systems hairpin-like structures. first system associated with an elliptic instability, prompted paired primary leading edge vortices (LEV), which remains persistent within entire Stc. However, growth second more closely undulations LEV...