【Daily Question】Fundamentals of Chemical Engineering 167: Convective Heat Transfer Coefficient (September 9)
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The last edit to this post was made by Zaihui Kangqiao on 2015-9-22 at 10:25. The Chemical Engineering Theory section is now launching a \"One Question per Day\" initiative aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequent series will include those on \"Principles of Chemical Engineering\", \"Mass Transfer and Separation\", \"Thermodynamics in Chemical Engineering\", and \"Chemical Process Engineering\". We hope for your active support! Answers to the questions in the \"One Question per Day\" initiative can be viewed directly, and the thread will be closed after 1 day ! Participation earns 2 wealth points, with an additional 3 wealth points for correct answers~~~ Fill-in-the-blank question: When water undergoes forced turbulent convective heat transfer in a circular straight pipe without any phase change, if its flow velocity is doubled, its convective heat transfer coefficient can become _________ times the original value. 2 to the power of 0.8
This post was last edited by Snow Leopard Commando on 2015-9-9 08:37. When water undergoes forced turbulent convective heat transfer in a circular straight pipe without any phase change, if its flow velocity is increased by a factor of 2, its convective heat transfer coefficient can become _____2^(0.8)____ times the original value. For fluids with low and high viscosity undergoing forced turbulent flow in circular pipes, the convective heat transfer coefficients are respectively Nu=0.023Re^（0.8）*Pr^n, Nu=0.027Re^（0.8）*Pr^(1/3)*(μ/μw)^0.14; whereas the Reynolds number Re=dρu/μ
When water undergoes forced turbulent convective heat transfer without phase change in a circular straight tube, if its flow velocity is doubled, its convective heat transfer coefficient can become ___ 2^0.8___ times the original value.
When water undergoes forced turbulent convective heat transfer without phase change in a circular straight pipe, increasing its flow velocity by a factor of 2 can increase the convective heat transfer coefficient to 1.74 times the original value.
1.74 !!!!!!!!!!!!!
When water undergoes forced turbulent convective heat transfer without phase change in a circular straight pipe, increasing its flow velocity by a factor of 2 can increase its convective heat transfer coefficient to 2.08 times the original value.
When water undergoes forced turbulent convective heat transfer without phase change in a circular straight pipe, increasing its flow velocity by a factor of 2 can increase its convective heat transfer coefficient to 2 times the original value.
2 to the power of 0.8. . . . . . . . . . . . .