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Experimental results indicate that the local heat transfer coefficient h g for flow over a flat plate with an extremely rough surface is approximated by the relation
h x = a x -0.12
Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?
h x = a x -0.12
Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?
- a)1.136 h x
- b)2.136 h x
- c)3.136 h x
- d)4.136 h x
Correct answer is option 'A'. Can you explain this answer?
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Experimental results indicate that the local heat transfer coefficient...
Explanation: h = 1.136 a x -0.12 = 1.136 h x.
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Experimental results indicate that the local heat transfer coefficient...
Relation between local heat transfer coefficient and average heat transfer coefficient:
The relation between the local heat transfer coefficient hx and the average heat transfer coefficient hx_avg for a plate of length x can be determined by integrating the local heat transfer coefficient over the length of the plate.
Derivation:
Given that hx = a x^-0.12, we can integrate this expression over the length of the plate x to obtain the average heat transfer coefficient hx_avg.
∫hx dx = a ∫x^-0.12 dx
Integrating both sides, we get:
hx_avg = a * (x^0.88) / 0.88 + C
Where C is the constant of integration.
To simplify further, we can rewrite the expression as:
hx_avg = 1.136 * hx
Therefore, the relation between the average heat transfer coefficient and the local heat transfer coefficient for a plate of length x is hx_avg = 1.136 * hx.
Therefore, option 'A', 1.136 hx, is the correct answer.
The relation between the local heat transfer coefficient hx and the average heat transfer coefficient hx_avg for a plate of length x can be determined by integrating the local heat transfer coefficient over the length of the plate.
Derivation:
Given that hx = a x^-0.12, we can integrate this expression over the length of the plate x to obtain the average heat transfer coefficient hx_avg.
∫hx dx = a ∫x^-0.12 dx
Integrating both sides, we get:
hx_avg = a * (x^0.88) / 0.88 + C
Where C is the constant of integration.
To simplify further, we can rewrite the expression as:
hx_avg = 1.136 * hx
Therefore, the relation between the average heat transfer coefficient and the local heat transfer coefficient for a plate of length x is hx_avg = 1.136 * hx.
Therefore, option 'A', 1.136 hx, is the correct answer.
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Experimental results indicate that the local heat transfer coefficient hgfor flow over a flat plate with an extremely rough surface is approximated by the relationhx= a x-0.12Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?a)1.136 hxb)2.136 hxc)3.136 hxd)4.136 hxCorrect answer is option 'A'. Can you explain this answer?
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Experimental results indicate that the local heat transfer coefficient hgfor flow over a flat plate with an extremely rough surface is approximated by the relationhx= a x-0.12Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?a)1.136 hxb)2.136 hxc)3.136 hxd)4.136 hxCorrect answer is option 'A'. Can you explain this answer? for Chemical Engineering 2024 is part of Chemical Engineering preparation. The Question and answers have been prepared according to the Chemical Engineering exam syllabus. Information about Experimental results indicate that the local heat transfer coefficient hgfor flow over a flat plate with an extremely rough surface is approximated by the relationhx= a x-0.12Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?a)1.136 hxb)2.136 hxc)3.136 hxd)4.136 hxCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Chemical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Experimental results indicate that the local heat transfer coefficient hgfor flow over a flat plate with an extremely rough surface is approximated by the relationhx= a x-0.12Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?a)1.136 hxb)2.136 hxc)3.136 hxd)4.136 hxCorrect answer is option 'A'. Can you explain this answer?.
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