Fundamental study of electrohydrodynamically enhanced convective and nucleate boiling heat transfer /
The air conditioning, refrigeration, and aerospace icrofilm Inc. industries have recently started supporting research to study and understand the potential of the electrohydrodynamic (EHD) phenomenon as an active method for enhancing two-phase heat transfer. Knowing this, the primary focus of this r...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=733039031&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | The air conditioning, refrigeration, and aerospace icrofilm Inc. industries have recently started supporting research to study and understand the potential of the electrohydrodynamic (EHD) phenomenon as an active method for enhancing two-phase heat transfer. Knowing this, the primary focus of this research was to improve the fundamental understanding of EHD enhanced convective boiling through an experimental and an analytical study. A second objective was to provide more fundamental understanding of EHD enhanced nucleate boiling heat transfer. The research on EHD enhanced convective boiling consisted of first developing an experimental apparatus to study the local and overall heat transfer enhancement and pressure drop penalty associated with the application of the EHD phenomenon. An understanding of how the EHD forces enhanced or suppressed the heat transfer and pressure drop was obtained, as well as how the convective boiling process influenced the EHD forces. From the fundamental knowledge gained during the experimental study, an analytical model was developed which related the change in the EHD forces to the change in the flow momentum during convective boiling. This model provided insight into the attainable heat transfer enhancement and the pressure drop penalty for given operating parameters. The model is the first step in the development of an analytical model to predict the EHD enhanced heat transfer and pressure drop in convective boiling. The research on EHD enhanced nucleate boiling focused on first improving the fundamental understanding of how the EHD forces influenced the various nucleate boiling regimes. This understanding was obtained from electrical property measurements and experimental observations and measurements of the EHD enhanced nucleate boiling heat transfer. Relationships between important EHD parameters and nucleate boiling parameters were developed as a function of the applied voltage and the electrical and thermophysical properties of the fluid. |
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| Item Description: | Vita. "Major Subject: Mechanical Engineering". |
| Physical Description: | xxiii, 264 leaves : illustrations ; 28 cm. |
| Bibliography: | Includes bibliographical references (leaves 210-217). |