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 31 for “"Ice Growth"”.
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Improved ice growth modeling based on close-up analysis of aircraft ice accretion
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Heat and mass transfer effects of ice growth mechanisms in water and aqueous solutions
Research into ice crystallization processes is an important area of study. The desire to improve product quality and efficiency of processes involving ice crystallization in industries such as desalination by freezing, freeze drying, freeze concentration and freeze crystallization for food …
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Preliminary implementation of improved heat transfer and impingement-direction ice growth modeling in numerically simulated ice accretion (LEWICE/X
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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On the Physics of Ice Nucleation and Growth in Nanoscale
Fundamental understanding of ice formation on a surface, i.e. heterogeneous formation, is critical to suppress ice accretion on the surfaces. Ice formation on a surface includes two steps of ice nucleation and further ice growth. As water droplet is placed on a sub-zero surface, with a time delay, …
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Structure and Function of Macromolecular Antifreezes (Peptide, Glycopeptide, Fish)
… or glycopeptide antifreezes which inhibit ice growth. The relationship between the structures of these molecules and the mechanism by which they work in investigated in this thesis.
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Heat and Mass Transfer Modeling and Experimental Validation of a Novel Freeze Desalination Process
… to be an effective desalination method, a high ice growth rate and product purity must be achieved with energy usage comparable to that of competing technologies. The purpose of this thesis is to develop a coupled heat and mass transfer model to predict the growth rate and purity of the solid …
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Structure and statistical analysis of the microphysical properties of the comma-head region of cold-season midlatitude cyclones
… data set. Within the generating cell regions, ice particle number concentrations averaged 1.9 times larger inside generating cells compared to outside, and derived ice water contents and median mass dimensions averaged 2.2 and 1.1 times larger in cells. Supercooled water was directly measured …
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Factors Influencing the Morphology of Sea Ice
Due to the continuous melting of sea ice and rising sea levels, more studies are conducted on sea ice morphology and factors influencing the growth of ice. Sea ice is an integral part of the global climate system. It plays a vital role in the polar ecosystem, providing a habitat for organisms. Sea …
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On optical and physical properties of sea ice in the Baltic Sea
Sea ice has been recognized as one of the key elements of polar and sub-polar seas, including Baltic Sea. The existence of sea ice cover and its properties have influence to many aspects of marine biology, climate and seafaring. This thesis is concentrated on describing physical and optical …
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On a Cartesian cut-cell methodology for simulating atmospheric ice accretion on aircraft
Atmospheric in-flight ice accretion has been a significant operational hazard in aviation for decades. Super-cooled water droplets impinge on exposed surfaces such as wings and rotor blades. These droplets may freeze on the surface thereby changing lift characteristics and disturb weight and …
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Ocean fronts formed at sea ice boundaries
Meltwater input from sea ice forms a buoyancy source for the upper ocean which creates a strong density gradient in both horizontal and vertical directions. If, in particular, the ocean density front is formed in the Bering sea during winter, the frontal dynamics are influenced by local shelf/slope …
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The development of micro-sample electrical impedance analysis for freeze-drying process development
… rate, (3) study dielectric relaxation of ice and sugar solutions using interdigitate electrode and evaluate using electrical circuit elements. Method: The initial stage of the project involved a comprehensive study of water/ice using the broadband frequency range (10 Hz to 1 MHz) on a …
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Studies of the Arctic Ocean sea ice cover and hydrothermal heat fluxes
Since reliable ice extent estimates from satellite data became available in 1979 the Arctic sea ice cover has followed a declining long term trend. Over the last decade the decline has accelerated with record low sea ice extents recorded in 2002, 2005, 2007 and 2012. In order to explain the …
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Growth and motion at the Weddell Sea ice edge
The formation of sea ice in the presence of turbulence was studied using data from drifting buoy<br/>deployments and ice sampling in the Weddell Sea during April 2000. The study sought to<br/>improve understanding of pancake ice in terms of dynamics, heat fluxes, ice growth rates …
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The effects of precipitation and river runoff anomalies in a coupled ice-ocean model of the Arctic
A coupled ice-ocean model of the Arctic Ocean and adjacent seas is developed in order to study the effects of anomalies of precipitation and river runoff on sea ice. A dynamic-thermodynamic sea ice model is coupled to an ocean general circulation model which includes a turbulence closure scheme for …
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Hemmung der Eisrekristallisation in wässrigen Lösungen durch Antigefrierglykopeptide
Antifreeze proteins (AFP) inhibit the growth of ice crystals and, thus, play an important role in the survival of many organisms at temperatures below the freezing point. But many aspects of the mechanism of action are still not understood, especially for antifreeze glycoproteins and glycopeptides …
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The convective desalination of sea ice
… of the fundamental processes affecting the growth of sea ice in the polar oceans in order to improve climate models. Newly formed sea ice contains a significant amount of salt as liquid brine in the interstices of an ice matrix. My focus is on one of the processes by which the salt content …
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The Study of Weddell Sea Ice using passive microwave and buoy data
The growth of the Weddell Sea ice cover in 1980 is examined, using Nimbus-7 satellite Scanning Multi-channel Microwave Radiometer (SMMR) data in combination with data (positional, air temperature and atmospheric pressure) from 4 Nimbus-tracked drifting buoys. Ice concentrations are retrieved from …
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Physical and biogeochemical properties of seasonal sea ice in the Atlantic sector of the Antarctic marginal ice zone
The study of Antarctic sea ice biogeochemistry has largely focused on samples collected from pack ice during summer, with few winter data available. Measurements from the Antarctic marginal ice zone (AMIZ) have proven even more difficult to obtain. The AMIZ is a broad, circumpolar feature of the …
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Freeze fracturing of elastic porous media
… of rocks and other porous media due to ice growth inside pre-existing faults and large pores. My aim is to explain the basic physical processes taking place inside a freezing elastic porous medium and develop a mathematical model to describe the growth of ice and fracturing of ice-filled …
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