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.
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Showing 1 to 20 of 24 for “"viscous liquids"”.
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Viscous liquids in bubble columns
… dissertation is concerned with studies of highly viscous Newtonian and non-Newtonian liquids in bubble columns with, and without, draft tubes. The importance of the parameters influencing bubble column reactors is discussed with reference to previous work. The shapes and rise velocities of single …
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Heat transfer in heating and cooling of viscous liquids
… pertaining to the heating and cooling of viscous liquids and to the heat transfer of viscous liquids flowing in pipes was made. It was found that there was a marked lack of information on this subject. A double-pipe heat exchanger was constructed from standard iron pipe and copper tubing. …
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A generalized approach to increased mixing efficiency for viscous liquids.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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Field-driven dynamics of dilute gases, viscous liquids and polymer chains
… dynamical phenomena arising in dilute gases, viscous liquids and polymer chains. The problems considered herein pertain to the slip-induced motion of a rigid, spherical or nonspherical particle in a fluid in the presence of an inhomogeneous temperature or concentration field or an electric …
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Numerical Simulations of Interactions of Solid Particles and Deformable Gas Bubbles in Viscous Liquids
… particles and deformable gas<br />bubbles in viscous liquids is very important in many applications,<br />especially in mining and chemical industries. These interactions<br />involve liquid-solid-air multiphase flows and an<br />arbitrary-Lagrangian-Eulerican (ALE) approach is used for the …
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Experimental study of the atomization process for viscous liquids by meniscus perturbation and micro air jet
… motion of a needle and a micro air jet. Highly viscous liquids, such as glycerin and acrylic paint were successfully printed with this printing method within the line width of 1 mm. High-speed imaging technique was used to observe the evolution and mechanical perturbation of a liquid meniscus …
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Pick-and-place nanoassembly
… materials can be assembled using reservoirs of viscous liquids, non-viscous liquids, and soft solids. Deposited volumes span a range of 10 orders of magnitude from 10-24 to 10-14 liters. Structures with dimensions of 60 to 100 nm are common.
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Fluid flow measurement using correlation techniques
… flow measurement in laminar flow of highly viscous liquids (e.g. oils) and for the turbulent flow of liquids under steady and pulsating flow conditions. For low viscosity liquids (e.g. water) under laminar flow conditions the measurement is dependent on the flow characteristics and fluid …
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High Pressure Nuclear Magnetic Resonance Studies of Viscous Fluids
… study of molecular motions in a number of viscous liquids ((eta)(, )>(, )1 poise). Pressure studies are performed in order to examine explicitly the effect of volume on the motional characteristics. Where appropriate, ('13)C and ('2)D NMR are employed to obtain exclusively reorientational …
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Novel Shear-Thinning of Aged PDMS/Fumed Silica Admixtures and Properties of Related Silicone Elastomers
… of storage certain solid admixtures would become viscous liquids when subjected to additional high shear mixing. It was further found that the required aging period could be decreased if the admixture storage temperature were increased. The only known interaction of PDMS and uFSN at moderate …
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Molecular weight and concentration dependence of the thermal conductivity of polystyrene in benzene
… for measuring the thermal conductivity of viscous liquids. The annular gap was 0.052 inches and guard heaters were employed to minimize end losses and distortion of the steady-state temperature distribution at the ends. The apparatus was calibrated with three liquids of known thermal …
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Preparation of Nitrile Containing Siloxane Triblock COpolymers and Their APplication As Stabilizers For Siloxane Magnetic Fluids
… are transparent, microphase separated and highly viscous liquids. It was found that these triblock copolymers can stabilize nanometer gamma-Fe₂O₃ and cobalt particles in octamethylcyclotetrasiloxane or hexane. Hence PDMS-b-PCPMS -b-PDMSs represent a class of promising steric stabilizers for …
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Experimental Investigation of Jet Breakup at Low Weber Number
… the influence of inertial, surface tension, and viscous forces on the process of breakup, a range of Weber numbers from 5 to 110 was experimentally tested. A syringe pump was used to provide a constant flow rate and produce a jet at a given Weber number. The effects of surface tension and …
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On the electrohydrodynamics of drop extraction from a conductive liquid meniscus
… alone and in combination, for both light and viscous liquids. Combining pressure and field pulses is shown to be synergistic; drop volumes over a range of 175 to 1 were obtained, while maintaining good drop velocity. The differing strategies for obtaining large and small drops are described. …
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Exploiting Interfacial Phenomena to Expel Matter from its Substrate
… surfaces which can passively remove highly viscous liquids or dew, or retard ice accretion or frost formation, the physics of several dewetting and/or deicing mechanisms are yet to be fully understood. Even though we know how jumping-droplet condensation offers significantly better heat …
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Effects of Interfaces and Interactions between Multiphase Flow and Solid on Engineering Structures
Phenomena involving interactions between liquids and solids are widely observed in natural and industrial applications. Interactions between different phases of fluids and solid structures have great importance in engineering applications such as aircraft and submarine designs, multiphase liquid …
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Synthesis and characterization of "non-shrinking" nanocomposites for dental applications
… SSQ compounds obtained in high yield were viscous liquids at room temperature and formed soluble hybrids when formulated with existing dental-based monomers in different proportions. The synthesized materials were characterized chemically using FTIR, NMR, DSC, TGA and SEC to confirm polymer …
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Ultrafast photo-acoustic spectroscopy of super-cooled liquids
… longitudinal and transverse acoustic waves in liquids at gigahertz frequencies. The experimental effort was designed for the study of supercooled liquids whose slower relaxation dynamics extend to gigahertz frequencies at high temperatures and whose faster dynamics are centered uniquely in the …
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Hyphenated fourier transform infrared spectrometry: techniques for separations and analysis
… to show the effectiveness of using LC/FTIR for viscous liquids which are difficult analytes to deposit onto a solid substrate. Using this FT-IR technique allowed one to look at the degree of saturation/unsaturation in an olive oil sample. The linearity of the method was shown using a set of …
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