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Showing 1 to 20 of 35 for “"Thermophoresis"”.
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Thermophoresis in Colloidal Suspensions
… a non-equilibrium phenomenon also known as thermophoresis. Chapter 1 gives an introduction to the existing applications and basic concepts of thermophoresis and outlines some of the experimental and theoretical challenges that serve as a motivation for this PhD project. In Chapter 2, a …
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Numerical Study of Acoustophoretic and Thermophoretic Aggregation of Micro- and Nano-Sized Particles
… and non-invasive. For nanoparticle enrichment, thermophoresis has been recently proposed as an efficient way to accumulate nanovesicles in biomedical applications. Although numerous experimental and analytical studies have been undertaken to study the micro/nanoparticle aggregation mechanisms, …
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On the full lagrangian approach and thermophoretic deposition in gas-particle flows
… of small particles in turbulent flows by thermophoresis. Thermophoresis is the phenomenon whereby small particles suspended in a gas in which there exists a temperature gradient experience a force in the direction opposite from that of the temperature gradient. Previous researchers have …
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A study of flow and heat transfer of nanofluids: between two parallel plates, over a wedge and past a stretching sheet
… the increase in both the Brownian motion and the thermophoresis parameters, while the scenario reverses as the nanoparticle concentration only increases with the strengthen thermophoresis parameter and slow down with an increase in the Brownian motion parameter.
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Thermal radiation and slip effects on mhd stagnation point flow of nanofluid over a shrinking sheet
… parameter, radiation parameter, Brownian motion, thermophoresis parameter, velocity and thermal slip parameters. The governing partial differential equations are transformed into nonlinear ordinary differential equation by a similarity transformation. Then, the numerical solutions are solved by …
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Investigation of Fouling in Wavy-Fin Exhaust Gas Recirculators
… for representative conditions reveal that drag, thermophoresis and Brownian forces are the significant transport mechanisms and among them, the deposition process is dominated by thermophoresis. Soot deposition in a representative turbulent plain channel shows a direct relationship of the amount …
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MHD stagnation flow of nanofluid past a permeable shrinking surface with various conditions
… parameter, Brownian motion parameter, thermophoresis parameter, suction parameter, shrinking parameter, Prandtl number, Biot number and Lewis number. Using a similarity transformation, the governing partial differential equations are transformed into nonlinear ordinary differential …
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CFD Modeling of nanoparticle formation in a plasma synthesis reactor
… Transport of particles occurs by convection, thermophoresis, and brownian diffusion. Axial and radial diffusion of particles are considered. The commercially computational fluid dynamics code FLUENT Ã 6.0, is used for the detailed calculation of the turbulent fluid flow and particle growth. …
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Stagnation-point flow past a vertical stretching or shrinking sheets in a nanofluid with slip effect
… parameter, 6 , Brwonian motion parameter,No,Thermophoresis parameter, Nt, shear stress, r,, , heat flux, q. and mass flux, q.. are investigated graphically on the skin friction coefficient, C, , Iocal Nusselt number,Nu,and local Sherwood number,Sh,. Comparison with previously published …
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Advancing thermal field-flow fractionation for industrial polymer characterization
… coefficient (DT) and D. Existing studies of the thermophoresis of polymers in dilute solutions have revealed trends that may be utilized to solve challenges in polymer analysis. Specifically, DT has been observed to be molar mass independent (above 103 to 104 Da), polymer-solvent dependent, and …
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Computational analysis of magnetohydrodynamics boundary layer flow of nanofluid over a stretching sheet in the presence of heat generation or absorption and chemical reaction
… constant, heat source, Brownian motion, and Thermophoresis are analysed and compared. The numerical results for velocity, temperature, skin friction coefficient, concentration, Sherwood number, and Nusselt number are presented in tabular form and visualized graphically. The findings of the …
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Asymptotic analysis of mass-dominated convection in a nanofluid
… is introduced to depict the coupled effects of thermophoresis, sedimentation and particle diffusion. For a given experimental setup, β is a function of the particle size. The graph of β as function of the particle radius is an inverted parabola with two zero crossings. The first zero …
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MHD heat and MASS transfer of jet nanofluids flow on the porous wall with chemical reaction
… number parameter, Brownian motion parameter, and thermophoresis parameter. The boundary layer approximation is used to convert governing equations into ordinary differential equations with the boundary conditions. The obtained equations are solved by using Fourth-fifth order Rung-Kutta Fehlberg …
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Theoretical study of nanoparticle formation in thermal plasma processing Nucleation, coagulation and aggregation
… Transport of nanoparticles occurs by convection, thermophoresis and Brownian diffusion. The method of moments is used to solve the particle dynamics equation. The model is validated using experimental results from plasma reactors at laboratory scale. The results are presented in the following …
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CHARACTERIZATION OF NON-EQUILIBRIUMFLUCTUATIONS DURING FREE-DIFFUSION INHIGHLY-STRATIFIED SOLUTIONS OF GLYCEROL ANDWATER
… the stabilizing flow of nanoparticles induced by thermophoresis and the destabilizing flow determined by thermal convection. We analyzed Rayleigh- Bénard convection in a suspension of highly thermophilic nanoparticles with a large negative separation ratio Ψ = −3.5 heated from below. We …
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Development of PET Radiotracers for Imaging Neurodegeneration: Targeting alpha-Synuclein Fibrils and TSPO
… of a novel biophysical technique – microscale thermophoresis (MST). A general automated radiosynthetic method to afford the [18F]fluoro-derivatives of these compounds has also been developed, and preliminary in vitro autoradiography studies and an in vivo microPET scan has been performed. For …
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Analysis of the biophysical and in silico exploration of the interaction between small ribonucleoprotein G and the RING finger domain of retinoblastoma binding protein 6 for the identification of protein anti-cancer compounds
… and Met194. Biophysical studies using MicroScale Thermophoresis (MST) confirmed the putative SNRPG~RING Finger domain interaction, and determined that the binding affinity was a Kdvalue of 3.1596 nM under aqueous buffer conditions. The overall results from this study suggest the potential …
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Thioaptamers Targeting Dengue Virus Type-2 Envelope Protein Domain III
… thioaptamers using filter binding assays and thermophoresis technique. The apparent Kd ranged from 100 nM to 500 nM. The binding site was determined for thioaptamer DEN TA-1 with DENV-2 EDIII protein using NMR HSQC experiment and mapped on the EDIII structure. Small molecules were selected …
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Stratification in Drying Particle Suspensions
… show that stratification can be controlled using thermophoresis induced by a thermal gradient imposed on the drying suspension. To model larger systems on longer time scales, I explore implicit solvent models of drying particle suspensions in which the solvent is treated as a uniform viscous …
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In-Cylinder Soot Oxidation in an Optically Accessible Automotive Diesel Engine
… incandescence (PLII) imaging. Additionally, thermophoresis-based particle sampling techniques were implemented to obtain transmission electron microscope (TEM) images of soot aggregates and primary particles for detailed morphology analysis. It was observed that either increased fuel …
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