Calculate the heat transfer from a 60 cm x 60 cm plate on which air flows at 40⁰C and. The plate temperature is 100⁰ C while the air speed is 5 m/s.Find the thickness of the boundary layer at a distance of x = 20 cm. #The film temperatore, T:こニ+ The poferthes of air at Fic and 1atm: [ufingthe table of profertiesof air]0.02881Wm.K1.995X10 Smils0.7177# The reynolds nuemb er, Rq: (at he end of the blete)5mls) C0-6m)(1.995X10 Spm is)= 1.50376 x (05 < Sx105(Rex)→ ReLVL: L= Side= 0.6m%3Dこ> The flow is laminar.# The arerage nussetHt number, Nu :> Nu = hL = 0.664RPel130.5=>hL = 230.5358+ The average- h= (230. 5358 ) (0.02881)(0.6m)11.0696 wlm.k# The heat tsansfer, d:> d = hAsCTs-To) = (1.0676 )(0.6 x0.6) (100 -40 )= 239.1owheat transfer Coefficient, h : J= loocV= Smlsniveni As = 0.6ox0.6om?1.Too = 40°C# The external fooced Convection:The parallel flow over flat plate is afoo ced Convection.example of externalIn this CaslrymNu = C R" R"%3DandRecr = Sx1o5%3DTa,rAixATsFig: The schemadic

Re @ x =20 cm Re = ρ Vxμ = Vxν= 5 * 0.21.995 x 10-5=50125.31328 < critical reynold snumber ,…

Answered: d the thickness of the boundary layer…

Engineering

Mechanical Engineering

d the thickness of the boundary layer at a distance of x = 20 c

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.36P

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