Introduction to heat convectionSolved problemsHW-10-1- Determine the velocity distribution in the velocity boundary layer assuming second degree polynomial:u =C, +C,y+C,y?Answer: The boundary conditions are:du.. u = 0at y = 0; u = u, ;at y = 6;= 0at y = 8dy2yThis gives:يجب حفظ الشروط الحدية اذا كان الامتحان حضوري2- Determine the velocity distribution in the velocity boundary layer assuming third degree polynomial:u = C, +C,y+C,y' +C,y'Answer: The boundary conditions are:.. u = 0at y = 0= 0dy?at y = 0du= 0u = u,at y = 8at y = 8dy3 y 1yThis gives:28 28يجب حفظ الشروط الحدية اذا كان الامتحان حضوري3- Determine the velocity distribution in the velocity boundary layer assuming fourth degree polynomial:2u = a, +a, y+a,y +a,y' +a,yAnswer: The boundary conditions are:. u = 0= 0dy?at y = 0at y = 0du= 0dyd'uat y = 6 ;dy?u = u,at y = 6at y = 64.This gives:= 2يجب حفظ الشروط الحدية اذا كان الامتحان حضوري4- For flow over a slightly curved surface, the local shear stress is given by the relation:0.5T,(x) = 0.3ULSFrom this dimensional equation, obtain non-dimensional relations for the local and average frictioncoefficients.Answer::0.61.2ReRe

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1- Determine the velocity distribution in the velocity boundary layer assuming second degree polynomial: u=C, +C,y+C,y²

Elements Of Electromagnetics

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ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Question

Introduction to heat convection
Solved problems
HW-10-
1- Determine the velocity distribution in the velocity boundary layer assuming second degree polynomial:
u =C, +C,y+C,y?
Answer: The boundary conditions are:
du
.. u = 0
at y = 0; u = u, ;
at y = 6;
= 0
at y = 8
dy
2
y
This gives:
يجب حفظ الشروط الحدية اذا كان الامتحان حضوري
2- Determine the velocity distribution in the velocity boundary layer assuming third degree polynomial:
u = C, +C,y+C,y' +C,y'
Answer: The boundary conditions are:
.. u = 0
at y = 0
= 0
dy?
at y = 0
du
= 0
u = u,
at y = 8
at y = 8
dy
3 y 1y
This gives:
28 28
يجب حفظ الشروط الحدية اذا كان الامتحان حضوري
3- Determine the velocity distribution in the velocity boundary layer assuming fourth degree polynomial:
2
u = a, +a, y+a,y +a,y' +a,y
Answer: The boundary conditions are:
. u = 0
= 0
dy?
at y = 0
at y = 0
du
= 0
dy
d'u
at y = 6 ;
dy?
u = u,
at y = 6
at y = 6
4.
This gives:
= 2
يجب حفظ الشروط الحدية اذا كان الامتحان حضوري
4- For flow over a slightly curved surface, the local shear stress is given by the relation:
0.5
T,(x) = 0.3
ULS
From this dimensional equation, obtain non-dimensional relations for the local and average friction
coefficients.
Answer::
0.6
1.2
Re
Re

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