Engineering, 08.04.2021 23:50 david7962
Consider a situation where water is used as the coolant in a heat exchanger for a micro-electromechanical device (MEM device). The characteristic velocity is estimated to be 10 microns/s, the length scale of the system is 100 microns, and the characteristic temperature difference of the problem is 10 K. Given what you know about the system, what assumptions can you make about the flow (namely: is it viscous (diffusion)dominated or inertia (convection) dominated, is it conduction dominated or convection dominated, are viscous dissipation effects important, etc.)
Answers: 1
Engineering, 04.07.2019 18:10, hadellolo8839
Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false
Answers: 3
Engineering, 04.07.2019 18:10, bckyanne3
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Engineering, 04.07.2019 19:10, juneham
Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.
Answers: 2
Consider a situation where water is used as the coolant in a heat exchanger for a micro-electromecha...
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