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<p class=MsoNormal>Dear College of Engineering Faculty:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Ashley Higgins will be defending her Masters Thesis on
Friday, June 18<sup>th</sup> at 10:00 am in Mechanical Engineering Large
Conference Room. Please encourage your graduate/senior students to attend her
defense if they are working in a similar area.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Suresh Khator<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt;text-align:justify;line-height:
200%'><b><span style='font-size:14.0pt;line-height:200%'>Abstract<o:p></o:p></span></b></p>
<p class=MsoNormal style='margin-bottom:12.0pt;text-align:justify;line-height:
200%'>An analysis of high-speed images of two-phase flow inside an adiabatic
multipli-connected microchannel array was performed. Bubble growth rates, heat
flux into bubbles, and observations of void fraction are analyzed and reported.
The test section was a silicon micro-array consisting of a series of
interconnected 50<i>µm </i>x 50<i>µm</i> channels, and the working fluid was
R-11. The chip was heated using a resistive heater, and the flow was observed
through a glass upper surface at 5000 <i>fps</i>. Flow rates varied from 6.2<sup>
</sup> to 24.7 <i>mg/s</i>, and power to the fluid varied from 30 to 780 <i>mW</i>.
Heat transfer rates into the bubbles ranged from 0.007 to 9.15 <i>mW</i> with
heat flux magnitudes from 0.02<i> </i>to 6.9<i> W/cm<sup>2</sup></i>. A
Fourier transform analysis of void fraction records showed a strong link
between the dominant frequency observed in downstream vapor motion and the
bubble departure frequency at isolated upstream nucleation sites.<o:p></o:p></p>
<p class=MsoNormal><b>Committee Members</b>: Dr. D. Keith Hollingsworth, Dr.
Larry C. Witte, Dr. Paul Ruchhoeft and Dr. Dong Liu<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>_______________________________________________________</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>Suresh K. Khator, Ph.D., P.E. Phone:
713-743-4205 <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>Associate Dean, College of Engineering Fax: 713-743-4214<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>University of
Houston Email:
skhator@uh.edu <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>E421 Engineering Bldg
2 www.egr.uh.edu/ie<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Book Antiqua","serif";
color:blue'>Houston, TX 77204-4008<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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