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Events for April 12, 2006
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Apply now for VSC funding Board!
Wed, Apr 12, 2006
Viterbi School of Engineering Student Organizations
Student Activity
Apply now for VSC Funding Board. You can find more information online at:http://viterbi.usc.edu/students/vsc/
Audiences: Undergraduate
Contact: Viterbi Student Council
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Meet USC (AM session)
Wed, Apr 12, 2006 @ 09:00 AM - 12:00 PM
Viterbi School of Engineering Undergraduate Admission
Workshops & Infosessions
This half day program is designed for prospective freshmen and family members. Meet USC includes an information session on the University and the Admission process; a student led walking tour of campus and a meeting with us in the Viterbi School. Meet USC is designed to answer all of your questions about USC, the application process and financial aid.Reservations are required for Meet USC. Please call the USC Admission Center at (213) 740-6616 to check availability and to make an appointment. Be sure to tell them you are interested in Engineering!
Location: USC Admission Center
Audiences: Prospective Freshman and Family Members - RESERVATIONS REQUIRED
Contact: Viterbi Admission
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VCS Co-Op Program and Internship Workshop
Wed, Apr 12, 2006 @ 01:00 PM - 02:00 PM
Viterbi School of Engineering Career Connections
Workshops & Infosessions
Learn the difference between a Co-Op and an Internship--and what both types of opportunities can mean for your career!
Location: Ronald Tutor Hall of Engineering (RTH) - 211
Audiences: Everyone Is Invited
Contact: RTH 218 Viterbi Career Services
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Meet USC (PM session)
Wed, Apr 12, 2006 @ 01:00 PM - 03:00 PM
Viterbi School of Engineering Undergraduate Admission
Workshops & Infosessions
This half day program is designed for prospective freshmen and family members. Meet USC includes an information session on the University and the Admission process; a student led walking tour of campus and a meeting with us in the Viterbi School. Meet USC is designed to answer all of your questions about USC, the application process and financial aid.Reservations are required for Meet USC. Please call the USC Admission Center at (213) 740-6616 to check availability and to make an appointment. Be sure to tell them you are interested in Engineering!
Location: USC Admission Center
Audiences: Prospective Freshman and Family Members - RESERVATIONS REQUIRED
Contact: Viterbi Admission
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Viterbi Career Services Walk-In Hours
Wed, Apr 12, 2006 @ 02:00 PM - 04:00 PM
Viterbi School of Engineering Career Connections
Student Activity
Please feel free to come in during these walk-in hours! No appointment is necessary. Come in for resume reviews, internship information, to salary negotiations!
Location: Ronald Tutor Hall of Engineering (RTH) - 218
Audiences: Undergraduate/Graduate Engineering Students
Contact: RTH 218 Viterbi Career Services
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Low Pressure Performance of Micro/Meso Scale Knudsen Compressors by Dr. Y.-L. Han
Wed, Apr 12, 2006 @ 03:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Yen-Lin Han Department of Aerospace & Mechanical Engineering University of Southern California Los Angeles, CA Abstract:Continuing advances in MEMS fabrication capabilities and strategies are beginning to facilitate significant progress in miniaturizing the functionality of many conventional and unconventional thermo/mechanical machines. A significant number of these evolving devices require micro/meso-scale gas pumps or compressors in order to create complete, miniaturized systems. One option is the Knudsen Compressor, named in 1994 by Pham-van-Diep et al [1]. Knudsen Compressors are solid-state, micro/meso-scale gas pumps or compressors with no moving parts. Based on the rarefied flow phenomenon of thermal creep, Knudsen Compressors operate by imposing a temperature gradient across a high porosity, low thermal conductivity transpiration membranes [2]. Studies have shown that a Knudsen Compressor with an aerogel membrane, can be operated efficiently by either resistive or radiant heating techniques over a pressure range from about ten atmospheres down to 250 Torr [3][4]. Employing different 'membrane' configurations, Sone and Sugimoto have recently studied several meso/macro-scale thermal creep (thermal transpiration) pumps at pressures of around 2 Torr and lower.[5][6] At low pressures (< 1Torr), relevant issues encountered for providing efficient operation of micro/meso-scale Knudsen Compressors include; large membrane channel sizes, required because of relatively large molecular mean free paths; and "reverse" thermal creep in the connector sections due to finite connector channel to membrane channel size ratios. Mechanically machined aerogel membranes with circular channels have already been studied; results have shown that they are attractive candidates as Knudsen Compressor membranes at low pressures.[7] The performance of these membranes has also been found limited by rarefaction effects in the connector section such as reverse thermal creep flow, and related induced internal flows.[8] The principal goal of this study was to investigate in greater detail than previously reported[8] the fundamental limitations encountered in reducing a micro/meso-scale Knudsen Compressor's operating inlet pressures to as low as 10 mTorr (10-5 atm). Both experiments and simulations were employed in this investigation. For the experimental studies[9] aerogel membranes, incorporating mechanically machined 500 mm high, 0.5 mm long, and 1cm wide rectangular, supplementary flow-channels, were used for the investigation of a Knudsen Compressor stage's performance at low pressures. For connector section Knudsen numbers greater than about 0.1, the pressure ratio gain through an entire stage was seriously impacted by the connector section's reverse thermal creep flow. This finding is consistent with earlier circular channel results [8][9]. Direct Simulation Monte Carlo (DSMC) technique codes were constructed for further investigations of the reverse thermal creep flow in connector sections [9]. A two-dimensional simulated domain was adopted to mimic a simplified, rectangular channel, single stage Knudsen Compressor. The effects of the reverse thermal creep flow in simulated connector sections, for several connector to membrane channel size ratios and several wall temperature distributions, have been obtained in the simulations. The simulation results were in good agreement with appropriate theoretical predictions based on available flow coefficients [10]. This investigation quantifies, using the results of both experiments and simulations, the importance of reverse thermal creep induced flows
in the connector sections of low pressure, single stage micro/meso-scale Knudsen Compressors. As the connector section Knudsen number rises above about 0.1, the performance of Knudsen Compressors, with either rectangular or circular channels, will be progressively decreased by reverse thermal creep induced flows in the connector sectionsLocation: John Stauffer Science Lecture Hall (SLH) - , Rm 100
Audiences: Everyone Is Invited
Contact: April Mundy
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Doug Button - The Design Process at JBL
Wed, Apr 12, 2006 @ 05:30 PM - 07:00 PM
Viterbi School of Engineering Student Organizations
Student Activity
Doug Button is currently the Vice President of Research and
Development and has been with JBL for 18 years. He has delivered 10
AES papers on loudspeaker design of which 5 have been published. In
1997 was made a Fellow of the AES. He holds 11 patents which are core
technologies found in many of JBL professionals loudspeakers. Doug
will talk about his experience with Harman and JBL, outlining many of
his designs and the design process at JBL. Free pizza and soda.Location: Von Kleinsmid Center For International & Public Affairs (VKC) - 156
Audiences: Undergrad
Contact: IEEE
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Women In Engineering Alumnae/Undergraduate Networking Dinner
Wed, Apr 12, 2006 @ 06:00 PM
Viterbi School of Engineering Student Affairs
Receptions & Special Events
The Women in Engineering (WIE) Office invites Viterbi undergraduate women to attend the Women in Engineering Alumnae/Undergraduate Networking Reception on Wednesday, April 12, 2006 at 6pm. We are inviting female alumnae in the area to come back to campus and join us for an informal dinner with current female undergraduate engineering students at Upstairs Commons. This is an excellent opportunity for undergraduate female engineers to begin developing mentoring and networking relationships with women in the engineering field.Space is limited so RSVP by April 5th to viterbi.wie@usc.edu
Location: Upstairs Commons
Audiences: Viterbi Female Alumnae and Viterbi Undergraduate Women
Contact: Women In Engineering
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Alcon Labs Information Session
Wed, Apr 12, 2006 @ 06:00 PM - 07:30 PM
Viterbi School of Engineering Career Connections
Workshops & Infosessions
Join representatives of this company as they share general company information and available opportunities.
Location: Grace Ford Salvatori Hall Of Letters, Arts & Sciences (GFS) - 106
Audiences: Undergraduate/Graduate Engineering Students
Contact: RTH 218 Viterbi Career Services
