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 20 of 95 for “"nucleate boiling"”.
-
Nucleate boiling from polymer coated surfaces.
… of an examination of both the effects of nucleate boiling on polymer coated surfaces and the effects of the polymer coated surfaces on the nucleate boiling curve. The nucleate boiling curve (the curve resulting from plotting heat transferred per unit area versus the temperature difference …
-
The dynamics of bubbles in nucleate boiling
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1956
-
An Experimental Investigation of Electrowetting Modulated Nucleate Boiling
… we report a novel application of EW in enhancing nucleate boiling heat transfer. The working approach capitalizes on the complimentary roles of hydrophobicity and hydrophilicity in the fundamental processes of nucleate boiling, and takes advantage of the ability of EW to dynamically alter the …
-
Burnout in forced convection nucleate boiling of water
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1957.
-
A study of nucleate boiling in an accelerated system
… made of the influence of system acceleration on nucleate boiling heat transfer in saturated distilled water at approximately atmospheric pressure. Teats were made under standard gravitational acceleration and under 2.85 times the standard gravitational acceleration. Chromel A electrical …
-
Population of Active Sites in Nucleate Boiling Heat Transfer
Made available in DSpace on 2014-12-05T17:15:29Z (GMT). No. of bitstreams: 1 6000183.pdf: 4820994 bytes, checksum: 80116481a960348eac3fab35ac59798d (MD5) Previous issue date: 1959
-
Bubble Growth in Nucleate Boiling of a Binary Mixture
Made available in DSpace on 2014-12-05T17:15:31Z (GMT). No. of bitstreams: 1 6003880.pdf: 4519896 bytes, checksum: bb70302f2bb444955eb5bfcd532c6be9 (MD5) Previous issue date: 1960
-
Experimental design for study of nucleate boiling in porous structures
The superheat required to initiate nucleate boiling inside porous wicks is not well understood in practice. This thesis reports the design of an experimental setup for investigating the onset of vapor nucleation in sintered porous structures. Pressure sensing was evaluated as an effective means of …
-
Prediction of departure from nucleate boiling in PWR fast power transients
… of steady state versus transient Departure from Nucleate Boiling (DNB) models, for fast power transients under forced convective heat exchange conditions. Theoretical DNB models based on liquid film thickness variation are adapted and modified from existing studies into a generalized formulation …
-
Effect of additives on the critical heat flux in nucleate boiling
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1964.
-
Enhancement of nucleate boiling heat transfer by surface modification in a cold plate evaporator
… methods. This thesis focuses on improving boiling heat transfer by surface modification with R134a in a microchannel cold plate evaporator. Internal copper and brass surfaces were modified with the deposition of copper oxide nanostructures with the intention of improving nucleate boiling …
-
The effect of a knurled heat transfer surface upon pool nucleate boiling of normal pentane
<p>"The effect of knurling a nucleate boiling heat transfer surface was studied. The knurling utilized produced regular, four-sided, adjacent pyramids with an apex angle of 90 degrees. Four knurling densities were used ranging from 416 to 2591 pyramids per square inch. The transfer surface was …
-
A study of the effect of rotation on the nucleate boiling from a vertical copper cylinder
… investigation was performed to study the nucleate pool boiling heat transfer from a 3-in. long vertical cylinder rotating in liquid nitrogen at atmospheric pressure. The 1-in. diameter copper cylinder with internal heater was rotated at speeds of 175, 350, 500, and 695 rpm. A uniform heat …
-
Modeling and simulation of liquid microlayer formation and evaporation in nucleate boiling using computational fluid dynamics
The transport of latent heat makes boiling one of the most efficient modes of heat transfer, allowing a wide range of systems to improve their thermal performance, from microelectronic devices to nuclear power plants. In particular, Boiling Water Reactors (BWR) use boiling as the primary mode of …
-
Enhancement of Nucleate Boiling on Rough and Dimpled Surfaces with Application to Composite Spreaders for Microprocessors Immersion Cooling
… methods of cooling such as immersion cooling by nucleate boiling of dielectric liquids are being considered. For electronic cooling applications, dielectric liquids are chemically inert, environmentally friendly, and have low saturation temperatures (34 — 56oC at 0.1 MPa) advantageous for keeping …
-
Departure from nucleate boiling and pressure drop prediction for tubes containing multiple short-length twisted-tape swirl promoters
… pressure drop and the minimum departure from nucleate boiling ratio (MDNBR). In order to increase the power density of the IPWR, Ferroni [231 examined the possibility of inserting multiple short-length twisted-tapes (MSLTTs) in the cooling channels. For a fixed coolant mass flow rate, the …
-
Thermohydraulics and suppression of nucleate boiling in upward two-phase annular flow : probing multiscale physics by innovative diagnostics
In the fuel assemblies of a boiling water reactor (BWR) the steam quality increases along the assembly's length as heat is transferred from the fuel rods to the water coolant. Nucleate boiling is the dominant heat transfer mechanism at low and intermediate steam qualities (typical of the bubbly and …
-
Coupling electrolysis and surface patterning to improve onset of nucleate boiling and bubble departure in pool boiling heat transfer
… thesis investigates the enhancement of pool boiling heat transfer through the combined effects of electrolytic activation of bubble nucleation (via the hydrogen evolution reaction, HER) and engineering gold thin-strip microstructures fabricated on silicon substrates. The central hypothesis is …
-
Effect of combined nanoparticle and polymeric dispersions on critical heat flux, nucleate boiling heat transfer coefficient, and coating adhesion
… coating. The critical heat flux (CHF) values and nucleate boiling heat transfer coefficients (HTC) of nickel wires pre-coated using 1.0% alumina, 0.1% alumina, 500ppm polyallylamine hydrochloride (PAH), and 0.1% alumina combined with 500ppm PAH dispersions were determined using the pool-boiling …
-
An SEM surface study of nucleate pool boiling heat transfer to saturated liquid nitrogen reduced pressures from 0.1 to 0.9
"This study constituted an examination of both nucleate boiling and maximum heat flux characteristics of liquid nitrogen boiling from characterized surfaces. Several textures of gold plated copper surfaces were studied in addition to silver and silver oxide surfaces. Data were taken over a wide …
Page 1 of 5