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Showing 1 to 11 of 11 for “"particle-laden flows"”.
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Instabilities in particle-laden flows
Particles are present in many industrial processes and in nature. Dry granular flows and suspensions have been well studied and present a broad range of problems in terms of rheology and instabilities. In both cases, new phenomena are continually discovered. Indeed, complex behavior can be …
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Experimental Investigation of Liquid and Particle -Laden Flows in Microtubes
… in different regimes defined by the ratio of particle diameter to tube diameter. For example, for 0.33 D < dp < 0.46D, a shear-induced arching mechanism has been observed, similar to the arching phenomenon common to granular flows. Orthokinetic flocculation occurs when shear-induced particle …
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Millimeter-wave tomographic imaging of particle-laden flows in planetary landings
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Comparing Turbulent Dispersion Models for RANS Simulations of Particle-Laden Flows
The ingestion of sand-particles into turbomachinery decreases their longevity and perfor- mance and can even lead to failure. To address these problems, studying particle-laden flows is of high interest in the field. Due to their low computational cost, RANS simulations remain the preferred method …
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Evaluation of a Particle Sampling Probe to Measure Mass Concentration in Particle-Laden Flows
Particle ingestion is a prevalent issue for jet engines. During operation, sand and ash particles enter the engine and can cause serious problems, including erosion and buildup of Calcia-Magnesia-Alumina-Silicate (CMAS) deposits. Analyzing the particle mass concentration of the airflow can help …
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A high-order Legendre-WENO numerical scheme for the non-conservative kernel density equations modeling particle-laden flows
… integrate the kernel density equations for the particle phase of disperse flows. The kernel density equations arise from least squares minimization of the approximation of the position-velocity phase-space particle distribution by a sum of kernel density functions. For concreteness in this work, …
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Numerical Analysis of Respiratory Aerosol Deposition: Effects of Exhalation, Airway Constriction and Electrostatic Charge
The dynamics of particle laden flows are integral to the analysis of toxic particle deposition and medical respiratory aerosol delivery. Computational fluid-particle dynamics (CFPD) can play a critical role in developing a better understanding of particle laden flows, especially in a number of …
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AEROSOL EFFECTS IN HIGH SUPERSONIC FLOWS
… average rain drop of 2mm to sub-micron diameter particles. Similarly, volcanic eruptions and ever-present wildfires result in solid particles exhibiting a variety of species and sizes that are transported to every layer of the atmosphere. At supersonic speeds, encounters with particulates have …
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A novel state-space based method for direct numerical simulation of particle-laden turbulent flows
… numerical method for evolution of the particle density function, that describes particle-laden flows. The problem is stated purely in a deterministic Eulerian framework. The method is coupled to an incompressible three-dimensional Navier-Stokes solver. We focus on dilute suspensions …
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Applications of Data-Driven Learning Models in Fluid Mechanics: Solid-Fluid Multiphase Systems and Bat Flight
… and biological systems, encompassing particle-laden flows in chemical processing, urban airflow, and biological locomotion. Understanding and studying these interactions is essential for optimizing engineering designs and advancing scientific knowledge. This thesis explores three …
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High Order Explicit Semi-Lagrangian Method for the Solution of Lagrangian Transport and Stochastic Differential Equations
… the simulation of chemically reacting turbulent flows or particle-laden flows. Motivated by the high-fidelity simulation of chemically, reacting, turbulent shear layers in propulsion systems, this thesis also reports on the stability of the interaction of two cold flow shear layers. Consistent …