4. For a flat plate, the transition from the free convection boundary layer to the free convection turbulent boundary layer takes place at a Rayleigh number of about Ra = 1E9. A flat plate at 70 C is placed in a colder medium at 27 C. Find the location on the plate where this transition takes if the plate is placed in: a) air, b) Ammonia, c) water. All fluids are at 1 atm. %3D

4. For a flat plate, the transition from the free convection boundary layer to the free convection turbulent boundary layer takes place at a Rayleigh number of about Ra = 1E9. A flat plate at 70 C is placed in a colder medium at 27 C. Find the location on the plate where this transition takes if the plate is placed in: a) air, b) Ammonia, c) water. All fluids are at 1 atm. %3D

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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Lubricants

Lubricant can be expressed as the substance that is applied among surfaces to control the wear and tear and improve performance. Lubricants play an essential part in the safety of machinery components like gears, shaft, linkage, cam, clutches, and many others. The quantities which affect the amount of lubricant are temperature, surrounding conditions, speed of the components, and many more.

Question

4. For a flat plate, the transition from the free convection boundary layer to the
free convection turbulent boundary layer takes place at a Rayleigh number of
about Ra = 1E9. A flat plate at 70 C is placed in a colder medium at 27 C. Find
the location on the plate where this transition takes if the plate is placed in:
a) air, b) Ammonia, c) water. All fluids are at 1 atm.

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Step 2: TO FIND THE LOCATION ON THE PLATE WHERE TRANSITION TAKES IF PLATE IS PLACES IN AMMONIA

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