You have fabricated a 1000x scale model of a microscale feature that is to be used in a microchip. The device itself is only 1 mm in size and is therefore too small to test accurately. However, you'd like to know the heat transfer coefficient between the device and an air flow that has a velocity of 10 m/s. What velocity should you use for the test and how will the measured heat transfer coefficient be related to the actual one?

You have fabricated a 1000x scale model of a microscale feature that is to be used in a microchip. The device itself is only 1 mm in size and is therefore too small to test accurately. However, you'd like to know the heat transfer coefficient between the device and an air flow that has a velocity of 10 m/s. What velocity should you use for the test and how will the measured heat transfer coefficient be related to the actual one?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

calculations. A common room at a facility is used by personnel for food consumption and resting (Fig. 2). An air conditioning system is required for providing comfortable temperature of 23°C. You are asked to select the room dimensions (X= 10m, Y=2.4m and Z= 15m) and design a split air conditioning system suitable to meet the requirements for climatic conditions of a humid subtropical climate with long-term annual average high temperature of 26.4°C and minimum low of 16°C. The room can accommodate up to 6 - 12 staff members. The following kitchen appliances are used in the room: coffee machine, 2 microwaves, cooktop and dishwasher. S E COFFEE 128 O FFEE FIGURE 2. Common room layout Z X COFFEE Y
The thermal conductivity of a specific material is highly dependent on a number of factors. These include the temperature gradient, the properties of the material, and the path length that the heat follows. My question is how to add thermal conductivity? for example SS316 material has thermal conductivity=15W/mk if Gyroid shape is created with SS316 then what will be the total thermal conductivity?
You are testing a long-dwelling catheter for its biological response using a rat model. After implantation for 4 months you explant the catheter material and surrounding tissue. Histology shows the catheter material surrounded by a thin layer of aligned collagen that is, in turn, surrounded by numerous polymorphonuclear cells. What has occurred? Describe the short term and long term events that led to this outcome. Note: the fact that this is a rat model rather than a human is not the issue - the model is fine.
any help would be much appreciated thanks
A convection problem has a Nusselt number equai to 10. where the contribution of diffusion is normalised and set equal to a value of 1.0. Select the correct statementis): | The ratio of advection to diffusion is 9. The ratio advection to convection is 10 The ratio of convection to diffusion is 10. The ratio advection to convection is 9. The ratio of advection to diffusion is 10.
By model testing, do you think it is possible to predict the exact behaviour of the prototype? Explain with practical examples
2. The apparatus shown below is designed to measure the density of an unknown fluid (p2₂). The two sides of the device are separated by a movable, frictionless partition. The partition is attached to the immobile sidewalls of the device via springs (different spring constants) on either side. Before pouring fluid into the device, both springs are unstretched. The device has a rectangular cross-section and extends a width w into the page. Derive an expression for the unknown density p2 = f(p1, h₁, h₂, k₁, k2, Ax, g), where Ar is the displacement of the partition relative to its equilibrium location before the fluids are poured into the apparatus. h₁ P1 k₁ 5 P2 ли Ax k₂ h₂
If the specimens are of the same dimensions in an unsteady state transport experiments on heat transfer, the following properties related to transport are also the same except: A. density & thermal conductivity B. transfer area & characteristic length C. total volume
Required information Sometimes equations can be developed and practical problems solved by knowing nothing more than the dimensions of the key parameters. For example, consider the heat loss through a window in a building. Window efficiency is rated in terms of R value, which has the unit of ft2-hr-°F/Btu. A certain manufacturer offers a double-pane window with R = 2.5 and also a triple-pane window with R= 3.4. Both windows are 3.5 ft by 5 ft. On a given winter day, the temperature difference between the inside and outside is 45°F. How much heat is lost through the double-pane window? 315 Btu Return to question
Pores are important for the cells to enter and grow, as well as in capillary suction of tissue fluid and blood. They also provide a very large surface area for cell interaction. Calculate the surface area of a collagen sponge that is made of approximately 10,000,000 spherical pores (average 100 μm in diameter) that touch each other in one cubic centimeter.
When a fluid flows over a surface, the shear stress I (N/m) at the surface is given by the expression du dy surface where p is the viscosity (N-s/m), u is the velocity parallel to the surface (m/s), and y is the distance normal to the surface (cm). Measurements of the velocity of an air stream flowing above a surface are made with an LDV (laser-Doppler-Velocimeter). The values given below were obtained. y y 0.0 0.00 2.0 88.89 1.0 55.56 3.0 100.00 2 At the local temperature, p = 0.00024 N-s/m. In four decimal places, calculate du/dy at the surface using all the points. Answer =
need fast please