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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 191 to 200 of 1279 (0.013 seconds)| 191 |
Strumenti e metodi per la progettazione industriale applicati alla conservazione e valorizzazione dei beni culturaliFantini, Massimiliano <1973> 15 June 2007 (has links)
No description available.
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| 192 |
Studio del moto dei fluidi in mezzi porosi in regime non-darcyTabaroni, Gian Carlo <1976> 17 May 2007 (has links)
No description available.
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| 193 |
Nuove prospettive per la produzione energeticaTerzi, Luigi Andrea <1972> 25 June 2007 (has links)
No description available.
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| 194 |
Meccanismi piani con gioco: luoghi ad errore di posizione massimo costanteCocconcelli, Marco <1977> 22 May 2007 (has links)
No description available.
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| 195 |
Analisi e sintesi di meccanismi spaziali per lo studio del moto passivo del ginocchio umanoOttoboni, Andrea <1977> 22 May 2007 (has links)
No description available.
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| 196 |
Experimental and Numerical Analysis of Gas Forced Convection through Microtubes and Micro Heat ExchangersYang, Yahui <1984> 24 May 2013 (has links)
The last decade has witnessed very fast development in microfabrication technologies. The increasing industrial applications of microfluidic systems call for more intensive and systematic knowledge on this newly emerging field. Especially for gaseous flow and heat transfer at microscale, the applicability of conventional theories developed at macro scale is not yet completely validated; this is mainly due to scarce experimental data available in literature for gas flows. The objective of this thesis is to investigate these unclear elements by analyzing forced convection for gaseous flows through microtubes and micro heat exchangers.
Experimental tests have been performed with microtubes having various inner diameters, namely 750 m, 510 m and 170 m, over a wide range of Reynolds number covering the laminar region, the transitional zone and also the onset region of the turbulent regime. The results show that conventional theory is able to predict the flow friction factor when flow compressibility does not appear and the effect of fluid temperature-dependent properties is insignificant.
A double-layered microchannel heat exchanger has been designed in order to study experimentally the efficiency of a gas-to-gas micro heat exchanger. This microdevice contains 133 parallel microchannels machined into polished PEEK plates for both the hot side and the cold side. The microchannels are 200 µm high, 200 µm wide and 39.8 mm long. The design of the micro device has been made in order to be able to test different materials as partition foil with flexible thickness.
Experimental tests have been carried out for five different partition foils, with various mass flow rates and flow configurations. The experimental results indicate that the thermal performance of the countercurrent and cross flow micro heat exchanger can be strongly influenced by axial conduction in the partition foil separating the hot gas flow and cold gas flow.
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| 197 |
Functional ceramic foams from preceramic polymersBiasetto, Lisa <1977> 23 May 2007 (has links)
No description available.
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| 198 |
Multilevel converters: dual two-level inverter schemeLega, Alberto <1977> 29 May 2007 (has links)
No description available.
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| 199 |
Control of matrix convertersZarri, Luca <1972> 29 May 2007 (has links)
No description available.
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| 200 |
Simulation of gas breakdown and plasma dynamics in plasma focus devicesFrignani, Michele <1978> 25 June 2007 (has links)
No description available.
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