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.
Results
Showing 1 to 13 of 13 for “"Péclet"”.
-
Characterization of the response of the hydrodynamic trap using a control-based approach
… trap performance for a wide range of particle Péclet numbers and response times. Overall, an increased understanding of trap performance will facilitate the design of improved controllers to enable robust trapping under variable system parameters.
-
Polymer translocation: a nonequilibrium process
… for several polymer lengths and two different Péclet values (that quantify the drift-diffusion balance of the system). By measuring the average conformation of the polymer and the average duration of each stage, simulations of the capture process reveal an elongated polymer approaching the …
-
On Enforcing Maximum Principles and Element-Wise Species Balance for Advective-Diffusive-Reactive Systems
… solutions for a wide range of input data (e.g., Péclet and Damköhler numbers) and for complicated geometries. It is well-known that physical quantities like concentration of chemical species and the absolute temperature naturally attain non-negative values. Moreover, the governing equations of an …
-
Sensitivity analysis on steady bionanofluid boundary layer flow
… to the Lewis number whereas the bioconvection Péclet and Schmidt numbers are the key drive parameters to the local density of motile microorganism. The theoretical study that comes with numerical results serve as an initial guideline or reference for future experimental studies and future …
-
Novel pillar formation in evaporating poly(ethylene oxide) droplets
… is the result. I show that the dimensionless Péclet number Pe, which compares the relative effects of evaporation and diffusion on the polymer motion, successfully predicts the precipitation time and thus the final deposit shape. To incorporate the effect of molecular weight into our …
-
Spatio-Temporal Dynamics of Reaction Zones in Catalytic Monolith Reactors
… systems results in unmatched axial mass and heat Péclet numbers and heat loss coefficient. It is shown that the unmatched dimensionless groups can lead to qualitatively different ignition/extinction behaviors in different scales. In the third part, the upstream creeping reaction zone in monolith …
-
Identifying Optimal Mixing Strategies and Structures through Sobolev Norms
… structure exhibits some variability as the Péclet number is increased. Finally, in Chapter 5, we study a mixing problem with a prescribed stream function chosen according to observations from the studies performed in this thesis. We find that a closed form solution emerges for a special …
-
Towards a coupled δ18O sugar and δ2H n-alkane approach in paleoclimate research
… more arid part of the transect. Using a Péclet modified Craig-Gordon model allows reconstructing biomarker-based RH values which correlate significantly with the actual RH values along the transect. Likewise, δ18Oprec and δ2Hprec can be calculated using the coupled biomarker approach and …
-
From local and bulk structure-flow correlations to macro-scale transport properties with MRI: applications using deformable porous media and deep learning
… the power law dependence of dispersion on Péclet number. Further, NMR flow diffraction phenomena revealed the evolution of structural properties with strain. A novel technique combining 3D spatially resolved MRI propagator measurements and a feedforward ANN was used as a means for …
-
Flow and mixing in complex porous media
… In the course of this study, a critical Péclet number for the instability in the first regime is identified, an improved averaged model for the flow in the second regime is derived and a detailed explanation of the asymptotic fate of the fingering instability in the third regime is …
-
Shear flow instabilities in stratified magnetohydrodynamics
… induction and magnetic diffusion) denote the Péclet and magnetic Reynolds numbers respectively. This extends the work presented in §4-§5 of Balmforth (2002) to include magnetic field effects. By numerically solving the amplitude equation at Pe,Rm∼O(1), we see that a weak magnetic field halts …
-
Characterization and performance of vertically-aligned carbon nanotubes in capacitive deionization systems
… showed that decreasing the advection-diffusion Péclet number and increasing the aspect ratio of the electrode compared to the channel space yields the highest salt rejection. In addition, tuning the duty cycle for salt rejection instead of complete electrode charging can yield faster water …
-
Étude du comportement des fluides magnétorhéologiques (MR) en compression-cisaillement simultanée
Les fluides magnétorhéologiques (MR) sont des fluides intelligents dont la viscosité apparente peut être modifiée rapidement (<1ms) par l'application d'un champ magnétique externe. À l'aide de cette caractéristique unique, les embrayages MR permettent de moduler rapidement un couple entre deux …