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ABSTRACT:The methods and outcome of an undergraduate senior design project related to the analysis of fluid flow and heat transfer in an electronic system with computational fluid dynamics (CFD) and design of vortex promoters for cooling the system are summarized in this article. The study emphasizes the necessity to teach CFD to Mechanical Engineering students at undergraduate level. ß

Demands of aerospace industry for high performance alloys have been increasing due to their superior thermal and mechanical properties. These properties, on the other hand, decrease the machinability resulting in lower productivity. Conventional machining techniques can be insufficient to provide higher productivity for these cases. Special processes such as turn-milling and rotary turning can be remedy in increasing productivity in these applications. In order to test the performance of these processes, Mori Seiki NTX2000 mill-turn machining center is used. This machine includes nine axes with two chucks, a milling spindle and a turning turret. The milling spindle whose head moves along the X-, Y-and Z-axes and rotates around the B-axis is used to control the inclination angle in turnmilling and rotary turning tests. Turn-MillingTurn-milling (Fig. 1) is relatively a new cutting operation which combines two conventional manufacturing processes; turning and milling. This promising technology becomes an alternative to classical turning due to its advantages such as higher productivity and lower cutting temperatures which provide longer tool life. Intermittent characteristics of turn-milling helps maintaining lower cutting temperatures which make higher cutting speeds possible, produce smaller chips and reduce cutting forces. Parts with large diameters which cannot be turned at high speeds can be machined with increased productivity using milling tools at high rotational speeds. Furthermore, in turn-milling cutting forces applied on the part

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