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 16 of 16 for “"Mixing systems"”.
-
Multi-modal mixing : gestural control for musical mixing systems
… the evolution of the interfaces used with these systems have not kept pace with the improvements in functionality. With all of their complexity, the new digital mixing consoles still look like the old analog mixers, with the addition of an LCD screen. This thesis will introduce a new type of …
-
Precipitation of micro/nanoparticles in enhanced high energy dissipation mixing systems
… the local rate of energy dissipation in the mixing precipitation zone where crystals are formed, thus promoting the formation of micro/nanoparticles, In this work, a submerged impinging jet system placed inside the tank was used in combination with another energy dissipation device, i,e., a …
-
Effect of impeller submergence on power dissipation and solids suspension in mixing systems equipped with pitch-blade turbines
Mixing and dispersion of solids in a liquid is a process frequently encountered in the pharmaceutical industry and often conducted in cylindrical baffled tanks stirred by mechanical impellers. In operations where the liquid level is decreased (as often which emptying the tank) the process must be …
-
Effect of Storage Tank Mixing on Water Quality
<p>Storage tanks are used by water systems to maintain pressure in the distribution system and to meet the varying water demands of the system. The design and operation of the storage tanks affect their mixing characteristics which affect the water quality. Poor mixing can lead to stratification in …
-
Investigation of chaotic mixing in laminar fluid systems by the use of computational fluid dynamics
… presents significant development into chaotic mixing induced through periodic boundaries and twisting flows. Three-dimensional closed and throughput domains are shown to exhibit chaotic motion under both time periodic and time independent boundary motions, A property is developed originating …
-
Topological chaos and chaotic mixing of viscous flows
… fluid or a microfluidic system, efficient mixing becomes a challenge. However, it is possible in a laminar flow to generate chaotic particle trajectories (well-known as chaotic advection), that can lead to effective mixing. This dissertation studies mixing in flows with the limiting case of …
-
An alloy selection and processing framework for nanocrystalline materials
… frameworks that extend to negative enthalpy of mixing systems and ordered grain boundary complexions. These models are used to develop a generalized stability criterion based on bulk thermodynamic parameters, which can be used to select alloy systems that are formally stable against grain …
-
CP-Violation and Baryogenesis on Electroweak Scales
… work deals with transport theory of quantum systems. Based on the derivation of quantum transport equations for one flavour we generalize to mixing systems with several flavours. One prominent and novel feature of our formalism is the appearance of oscillations of the off-diagonal densities …
-
Study of building material emissions and indoor air quality
… in a small office with different ventilation systems. The results show that displacement ventilation may not provide better IAQ than mixing systems if the VOC sources are from the floor. Further, our study shows sink effects from internal walls of gypsum board.
-
Systemanalyse und Entwicklung Six-Port basierter Funkempfängerarchitekturen unter Berücksichtigung analoger Störeffekte
… on the one hand, keep the advantages of additive mixing systems like: low power consumption, broadband capability and simplicity of implementation especially for mm-wave transmissions. On the other hand, these novel architectures comprise compensation techniques such that systematically generated …
-
Evaluation and modelling of perceived audio quality in popular music, towards intelligent music production
… addresses three fundamental questions: What is mixing? What makes a high-quality mix? How can high-quality mixes be automatically generated? While these may seem essential to the very foundations of intelligent music production, this thesis argues that they have not been sufficiently addressed …
-
A hydrodynamic study of nickel suspension in stirred tanks
Many studies on solid-liquid mixing have been dedicated to low density particles at low solids concentrations. In the present work, computational fluid dynamics (CFD) simulation and experimental methods were employed to study suspension of high density particles (nickel) at high solids …
-
Hydrodynamic CFD modeling of a pharmaceutical reactor vessel provided with a retreat-blade impeller under different baffling conditions
… of different unit operations. Within these systems, both the vessel and impellers are typically glass-lined in order to provide superior corrosion resistance, prevent product contamination, and enhance cleanability. This approach, in turn, often requires the use of different, and sometimes …
-
Experimental determination of the agitation requirements for solids suspension in dissolution systems using a mini paddle apparatus
… Mini vessels and mini paddle dissolution testing systems are smaller versions of the USP 2 Apparatus. The concept of the mini paddle apparatus is similar to that of the USP 2 setup but it is scaled down about to 1/5 of the volume and 40% with respect to vessel and impeller sizes. Mini vessel …
-
Novel experimental method for the determination of the minimum agitation speed for solids suspension in flat-bottomed stirred tank reactors
… to determine N_{js} for a variety of agitation systems and agitation conditions in tanks with a flat-bottom, the most common tank shape for which N_{js} has been obtained in previous studies. Flat bottom reactors are also among the most widely used reactors for research and development studies …
-
Design of Flow Reactors for the Continuous Synthesis of Nanoparticles
… 7.3 2.2 nm and 2.1 0.5 nm by controlling mixing efficiency and speciation of gold precursor. In order to understand the effect of mixing on the size of Au NPs, a novel CFD method is established based on a published algorithm to simulate the accurate concentration distribution, avoiding …