4B. A fluid is streaming over a flat surface maintained at a different temperature. Measurements of the localvelocity and temperature show that the hydrodynamic boundary layer is 10 times thicker than the thermalboundary layer. What kind of fluid could this be ? -(a) Water (b) Mercury(c) Air (d)Engine oil (Explain your choice of answer)4C. The total heat transfer rate between a pipe and water flowing through the pipe can be expressed as:→h=hA AT or alternatively, Q = mC₂AT = pvAC₂AT. Therefore,hA AT pvAC₂AT → pvcp.==Is this correct, and if not, what is wrong here?

The correct answer is to be identified.

Answered: 4B. A fluid is streaming over a flat…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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3. Show the step-by-step process. Do not use shortcut methods. Make it as detailed as it can be. MAKE A DIAGRAM AND ENCODE THE ANSWER.
Estimate the natural convection heat transfer coefficient of the horizontal pipe. The temperature of the outer surface of the pipe is 120 ° C. The ambient air temperature is 25 ° C. The outer diameter of the pipe is 10 cm. Convection coefficient = Answer W / m² ° C.
Two identical 7.5-cm cubes of copper at 425 and 90°C are brought into contact. Assuming that the blocks exchange heat only with each other and that there is no resistance to heat flow as a result of the contact of the blocks, plot the temperature of each block as a function of time, using the lumped-capacity method of analysis. That is, assume the resistance to heat transfer is the conduction resistance of the two blocks. Assume that all surfaces are insulated except those in contact.
Heat is transferred from condensing steam to a vertical surface and the resistance to heat transfer is attributable to the thermal resistance of the condensate layer on the surface. For a film of liquid flowing down a vertical surface, the variables influencing the film thickness, include: viscosity of the liquid (water), density of the liquid, the volumetric flowrate per unit width of surface and the acceleration due to gravity. Obtain the relevant dimensionless groups. For streamline it is found that the film thickness is proportional to the one third power of the volumetric flowrate per unit width. Calculate the percent change in thickness if the gravity increase by one-third of its original value?
Pls provide a complete and step by step solution. TY!
Problem 1 Length Required for Cooling Coil A cooling coil made of copper tube is immersed in a regulated constant temperature bath held at a temperature of 18 °C. The liquid flowing through the tube enters at 22 °C, and the coil must be sufficiently long to ensure the exit liquid sustains a temperature of 18.5 °C. The bath is so well stirred that heat transfer resistance at the tube-bath interface is minimal, and the copper wall resistance can also be ignored. Assume Plug Flow Model is applied for fluid flow profile in a tube. Thus, the tube wall temperature can be taken equal to the bath temperature. Use Eq. 1.17 to T(z) Control volume A) Estimate the required tube length (L) under the following conditions for the flowing liquid: Where Tw 1 z+Az T(z+Az) Nu = Since the Reynolds number is in the turbulent range, use the correlation of Sieder and Tate (Bird et al. 1960) to calculate h Nu hD k Pr= Re= C₂= 1 kcal/kg .°C R 0.01 m Vo = 1 m/s P DU OP μ 10³ kg/m³ н = 0.001 kg/m.s k = 1.43 10-4…
Draw flow diagrams for questions 2-4 and solve questions 1-4 with appropriate steps and correct values
Convection heat transfer occurs between a fluid at rest and a bounding surface O when the two are at different temperatures. solid and a bounding surface when O the two are at different temperatures. fluid in motion and a bounding surface when the two are at different temperatures. two fluids at rest when the two are at different temperatures. O
what is the answer a question?
Transport Phenomena Question
A window is made up of two panes of glass (with surface temperatures of 15 °C and 5 °C) that are separated by a gap of 3 cm. The said window has a height of 2 m and a width of 5 m. Initially, the gap is filled with air (flowing via temperature gradient). Then, this air space is partially evacuated such that the pressure is already 0.3 atm. This is done to lessen the heat transfer between the two panes of glass. Both glass surfaces have an emissivity of 0.9. Calculate the rate of heat transfer (W) through the panes.

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