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Option (1): Fluid in outer channel-Air, Fluid in inside channel - Water, Option (2): Fluid in outer channel - Water, Fluid in inside channel - Air

Option (1): Fluid in outer channel-Air, Fluid in inside channel - Water, Option (2): Fluid in outer channel - Water, Fluid in inside channel - Air

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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5-1) Which one is the right fin design, (1) or (2)? Answer (1) or (2). ZZZZ Flow in outer channel Flow in inner channel ZZZZZ Flow in outer channel Cross-sectional View Side View Option (1): Fluid in outer channel-Air, Fluid in inside channel - Water, Option (2): Fluid in outer channel - Water, Fluid in inside channel - Air The velocity conditions and hydraulic equivalent diameters are the same between inner and outer channels. The pressure and temperature conditions are also the same. 5-2) Consider oil flowing along with a flat plate parallelly. The oil flow creates laminar velocity and thermal boundary layers because the oil temperature and plate temperature are different. In general, which boundary layer of the oil is thicker, (1) velocity boundary layer or (2) thermal boundary layer? Answer (1) or (2). 5-3) Consider a Nukiyama's boiling curve for saturated water at atmospheric pressure. In general, which heat transfer coefficient is higher, (1) the heat transfer coefficient at the excess temperature of 10 °C or (2) the heat transfer coefficient at the excess temperature of 300 "C? Answer (1) or (2). Heating curve with nichrome and platinum wires Burnout of nichrome wire Absent in power controlled mode Cooling curve with platinum wire 10 30 AT, (C) 100 1000
Transcribed Image Text:5-1) Which one is the right fin design, (1) or (2)? Answer (1) or (2). ZZZZ Flow in outer channel Flow in inner channel ZZZZZ Flow in outer channel Cross-sectional View Side View Option (1): Fluid in outer channel-Air, Fluid in inside channel - Water, Option (2): Fluid in outer channel - Water, Fluid in inside channel - Air The velocity conditions and hydraulic equivalent diameters are the same between inner and outer channels. The pressure and temperature conditions are also the same. 5-2) Consider oil flowing along with a flat plate parallelly. The oil flow creates laminar velocity and thermal boundary layers because the oil temperature and plate temperature are different. In general, which boundary layer of the oil is thicker, (1) velocity boundary layer or (2) thermal boundary layer? Answer (1) or (2). 5-3) Consider a Nukiyama's boiling curve for saturated water at atmospheric pressure. In general, which heat transfer coefficient is higher, (1) the heat transfer coefficient at the excess temperature of 10 °C or (2) the heat transfer coefficient at the excess temperature of 300 "C? Answer (1) or (2). Heating curve with nichrome and platinum wires Burnout of nichrome wire Absent in power controlled mode Cooling curve with platinum wire 10 30 AT, (C) 100 1000
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