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Showing 1 to 20 of 145 for “"Fluid Flows"”.
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Coherent structures in incompressible fluid flows
The work is broadly related to the transition to turbulence in pipe at intermediate Reynolds numbers and includes a discussion of two classes of structures observed during the transition to turbulence: numerically-extracted solutions of the Navier-Stokes equations (the "exact'') and …
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Thermoacoustic Oscillations in Supercritical Fluid Flows
Pressure oscillations in supercritical Jet-A fuel flowing through four parallel, heated tubes connected to common manifolds have been observed in this study. Tests were performed with fuel inlet temperatures ranging from 70F to 700F, and fuel pressures ranging from 360-700 psi. Total fuel flow rate …
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High performance computing for multiphase fluid flows
Multiphase fluid flows are very common in engineering and science applications. Examples include air ow on water surface, metallurgical flow and blood flow in the body. In these flows, fluids are separated by a sharp interface and form different phases. The flow is characterized by the movement of …
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Understanding Vortex Reconnection in Complex Fluid Flows
Reconnection of wingtip vortices behind aircrafts is thought to be a cause of wake turbulence, detrimental to air traffic control. We observe the reconnection process for three initial vortex tube set-ups; anti-parallel, orthogonal and anti-parallel with axial flow. From these we are able to …
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Preconditioning methods for ideal and multiphase fluid flows
… ideal and multiphase multispecies compressible fluid flow solver using homogeneous equilibrium mixture model. The mathematical model for fluid flow going through phase change uses density and temperature in the formulation, where the density represents the multiphase mixture density. The change …
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CFD studies of complex fluid flows in pipes
The flow of rheologically complex fluids in industrial equipment poses a number of challenges, not least from a modelling point of view. Research is needed to further understand and be able to predict the flow behaviour of such materials and to investigate ways of improving their processing. This …
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Parameter Dependent Model Reduction for Complex Fluid Flows
When applying optimization techniques to complex physical systems, using very large numerical models for the solution of a system of parameter dependent partial differential equations (PDEs) is usually intractable. Surrogate models are used to provide an approximation to the high fidelity models …
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Multi-Scale Localized Perturbation Method for Geophysical Fluid Flows
… involving the interaction of large-scale natural flows with small-scale flows generated by man-made structures.
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A Preliminary Study to Assess Model Uncertainties in Fluid Flows
… a one-dimensional rectangular loop system. The fluid is heated up and cooled down along the vertical legs. A pressurizer and a pump are included along the horizontal legs. The compressible model is assumed to be the most accurate model in this study. Simulations show that under forced convection …
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Aggregation and fragmentation dynamics of inertial particles in fluid flows
In dieser Arbeit wird numerisch die Dynamik von Inertialpartikeln untersucht, die durch Kollisionen aggregieren und unter bestimmten Bedingungen wieder fragmentieren. Unser Ziel ist vor allem ein besseres Verständnis natürlicher Phänomene wie zum Beispiel die Bildung von Tropfen in Wolken und …
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Synthetic aperture imaging for three dimensional resolution of fluid flows
Fluid mechanics and instrumentation have a long history together, as experimental fluids studies play an important role in describing a more complete physical picture in a variety of problems. Presently. state-of-the-art instruments for fluid flows aim to resolve various quantities in …
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Prediction, analysis, and learning of advective transport in dynamic fluid flows
… background fields, i.e. advective transport, in fluid dynamical systems has been a widely studied problem. It is of crucial importance in classical fluid mechanics, geophysical flows, micro and nanofluidics, and biological flows. Even though mathematical models that thoroughly describe such …
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Dynamically orthogonal field equations for stochastic fluid flows and particle dynamics
… and they arise in a number of areas including fluid mechanics, elasticity, and wave theory, describing phenomena such as turbulence, random vibrations, flow through porous media, and wave propagation through random media. This is but a partial listing of applications and it is clear that almost …
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Development of a new wall shear stress gauge for fluid flows
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988.
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Shape Matching for Reduced Order Models of High-Speed Fluid Flows
While computational fluid dynamics (CFD) simulations are an indispensable tool in modern aerospace engineering design, they bear a severe computational burden in applications where simulation results must be found quickly or repeatedly. Therefore, creating computationally inexpensive models that …
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Sensitivity Calculations For Conservation Laws With Application To Discontinuous Fluid Flows
… derivatives of the variables that describe the fluid flow with respect to the parameters that determine the fluid flow. Sensitivities are of interest in their own right and are also of use in flow optimization, control and design and in the calculation of perturbed flows. Problems arise in all …
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Rectified inertial forces on spherical particles in oscillatory fluid flows near interfaces
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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A simultaneous solution procedure for fully coupled fluid flows with structural interactions
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Finite element methods for the time dependent simulation of viscoelastic fluid flows
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1996.
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