Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Low Reynolds number flow"”.
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Surface actuation based flow control for low Reynolds number flow past an airfoil
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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A low Reynolds number flow problem with application to spermatozoan transport in cervical mucus.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1972. M.S.
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Effect of Flow-Acoustic Resonant Interactions on Aerodynamic Response of Transitional Airfoils
… study is conducted to examine the impact of flow-acoustic resonant interactions on the aerodynamic response of symmetric and cambered airfoils in the realistic transitional flow regimes with Rec=140,000 and M=0.0465 as well as the low Reynolds number flow regime with Rec=10,000 and M=0.2. The …
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Design of a Low Reynolds Number Propulsion System for an Autonomous Underwater Vehicle
… capable of predicting the viscous effects of low Reynolds number flow that is experienced by small, slow turning propellers. The methodology consists of determining the minimum induced loss lift distribution for the propeller via lifting line theory, efficient airfoil sections for the …
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Solution of fluid-structure interaction problems using a discontinuous Galerkin technique
… The ability of the scheme to handle complex flow problems is demonstrated by analyzing the low Reynolds number flow over an oscillating circular cylinder.
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An experimental study of unsteady separation in a two-dimensional flow
An experimental study of flow separation in an incompressible two-dimensional unsteady flow was undertaken with the aim of validating recently developed flow separation criteria, which are based on kinematic principles. Specifically, the so-called rotor-oscillator arrangement was utilized to …
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Design, Simulation, and Wind Tunnel Verication of a Morphing Airfoil
… Fiber Composites (MFCs). These devices exhibit low power draw but excellent bandwidth characteristics. This thesis provides a background in the 2D analytical and computer modeling tools and methods needed to design and characterize an MFC-actuated airfoil. A composite airfoil is designed with …
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Similarity Solutions for the Two-Dimensional Diffusion–Advection Equation in Sharp-Corner Geometries
… and engineering, including in fluid mechanics. Low-Reynolds-number flow patterns near sharp corners, including Moffatt eddies, have been studied extensively in the past. Here, we focus on the effect of Moffatt eddies on concentration profiles near sharp corners. The Lie symmetry method is …
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Simulations of a passively actuated oscillating airfoil using a discontinuous Galerkin method
… and bats, effectively maneuver in transitional, low Reynolds number flow, outperforming any current small engineered flapping vehicle. Thus, engineers are inspired to investigate the flapping dynamics present in nature to further understand the non-traditional flow aerodynamics in which they …
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Aerodynamic and Electromechanical Design, Modeling and Implementation Of Piezocomposite Airfoils
… they require high voltage input; however the low power consumption allows for relatively lightweight electronic components. Another challenge, for piezoelectric actuated aerodynamic surfaces, is found in operating a relatively compliant, thin structure (desirable for piezoceramic actuators) in …
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Large Scale Simulations of Bidisperse Emulsions and Foams
… algorithms which scale as O(N2), where N is the number of droplets. In our research, we have developed a novel, fast and efficient algorithm which scales as [O( N1n(N)]. The algorithm has been implemented to simulate the low Reynolds number flow of large-scale systems of monodisperse and …
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Microfluidic bubble logic
… a dropletel,internal, inherently digital flow control mechanism at kHz frequencies with no moving parts or off-chip components. Nonlinearity is introduced in an otherwise linear, reversible, low Reynolds number flow via bubble-tobubble hydrodynamic interactions. I demonstrate bubble logic …
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Fully Turbulent Wakes at Low Reynolds Numbers: the Case of the Thin Flat Plate
The wake of a thin flat plate normal to uniform flow exhibits unique behaviour, with much research suggesting it undergoes a fundamentally different Reynolds number-dependent tran-sition process to turbulence than wakes behind canonical geometries. Moreover, there is vast disagreement over the …
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Aerodynamic and Acoustic Modeling for eVTOL Rotor Noise Prediction
… The approach couples sectional two-dimensional Reynolds-Averaged Navier-Stokes (2D-RANS) airfoil simulations with rotor loading predictions from the Comprehensive Hierarchical Aeromechanics Rotorcraft Model (CHARM), tonal noise calculations using the acoustic solver PSU-WOPWOP, and broadband …
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A novel boundary element method for low Reynolds number external flow of biological fluid dynamics
Consider two dimensional low Reynolds number flow past a body. In this thesis, the problems of steady flow past a circular cylinder, steady flow past an elliptical cylinder, and the motion of a generic tail-like body are investigated. The theoretical treatment by Chadwick (Chadwick, 2013) is …
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Heat Transfer, Transition, And Aerodynamic Loss In A Linear Vane Cascade At Low Reynolds Numbers In High Speed Flows
<p>Low pressure turbine research is essential for improving the efficiency of the modern gas turbine engine. At high altitude cruise conditions, the low pressure turbine experiences low Reynolds number flow, which produces a laminar boundary layer on airfoil surfaces. The integrity of the laminar …
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Numerical investigations of vortex dynamics: bursting, twist waves, and sensitivity analysis
… structures are ubiquitous in real-world fluid flows, from the vortices generated by swimming fish to the wakes of aircraft and propellers. They form the backbone of high Reynolds number turbulent flows. Their dynamics are governed by non-linear processes, leading to a range of vortical …
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Protein polarization in packed hollow fibre bioreactors
… in the extra capillary space (ECS) of hollow fibre bioreactors (HFBRs), can influence the hydrodynamics of such devices. A mathematical model was developed to describe the coupled hydrodynamics and high molecular weight protein transport in a cell filled HFBR. It was assumed that the …
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Unsteady Aerodynamic/Hydrodynamic Analysis of Bio-inspired Flapping Elements at Low Reynolds Number
… swimming vehicles. These vehicles operate in a low Reynolds number flow regime where viscous effects dominate flow interactions, which makes it challenging to generate lift and thrust. Overcoming these challenges means utilizing non-conventional lifting and flow control mechanisms generated by …
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Micro air vehicle motion tracking and aerodynamic modeling
… of micro air vehicles (MAVs) flying at Reynolds numbers between 10,000 and 30,000. Experimental studies have shown the aerodynamic effects of low Reynolds number flow on wings and airfoils, but the amount of work that has been conducted is not extensive and mostly limited to tests in …
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