Determine the tube diameter that corresponds to a 10% reduction in the convection heat transfer coefficient for
Question:
Determine the tube diameter that corresponds to a 10% reduction in the convection heat transfer coefficient for thermal and momentum accommodation coefficients of αt = 0.92 and αp = 0.89, respectively. Determine the channel spacing, a, that is associated with a 10% reduction in h using the same accommodation coefficients. The gas is air at T = 350 K and
atmospheric pressure for both the tube and the parallel plate configurations. The flow is laminar and fully developed with constant surface heat flux.
Step by Step Answer:
Calculation The tube diameter that corresponds to a 10 reduction in the convecti...View the full answer
Fundamentals Of Heat And Mass Transfer
ISBN: 9780470501979
7th Edition
Authors: Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt
Related Video
An air pump is a device used to inflate or deflate objects by moving air in or out of them. There are many different types of air pumps, ranging from manual hand pumps to electrically powered pumps, and they are used for a variety of purposes. John had trouble blowing up many balloons without a balloon pump and experienced pain. He solved this problem by using an empty plastic bottle with a rectangular-shaped hole in the cap, a cut piece of balloon stretched over it, and a small hole in the bottle. By pressing and releasing the bottle, he created an air pump to inflate the balloons without any discomfort. Air pumps utilize fluid mechanics and thermodynamics principles to increase air pressure inside an object being inflated, such as a bicycle tire. The ideal gas law is used to calculate the pressure inside the tire. As air pressure increases, the object becomes more rigid and can support more weight. The efficiency of the pump is determined by how much of the work done is converted into useful work, such as inflating the tire, and how much is lost as heat. Understanding these principles is important to effectively use and optimize the use of air pumps.
Students also viewed these Physics questions
-
Determine the average convection heat transfer coefficient for the 2.5-m-high vertical walls of a home having respective interior air and wall surface temperatures of (a) 20 and 10C and (b) 27 and 37C
-
The convection heat transfer coefficient for a clothed person standing in moving air is expressed as h = 14.8V 0.69 for 0.15 < V < 1.5 m/s, where V is the air velocity. For a person with a body...
-
Determine the convection heat transfer coefficient for the flow of (a) Air (b) Water at a velocity of 2 m/s in an 8-cm-diameter and 7-m-long tube when the tube is subjected to uniform heat flux from...
-
Carrefour issue its own credit card. The sales manager purchase clothes for his family for 900 using Carrefour credit card on the 1st of April. If Carrefour charge 2% per month on the amount the...
-
Kiresh, Inc. uses the LIFO retail inventory method for costing inventory. It has beginning inventory at a cost of $ 57,000 and retail value of $ 95,000. During the year, Kiresh purchased goods with a...
-
Alabama Bank is willing to buy or sell British pounds for $1.98. The bank is willing to buy or sell Mexican pesos at an exchange rate of 10 pesos per dollar. The bank is willing to purchase British...
-
\(4 \times(5+2 \times(6+8))+10 \times 3^{2}\) Perform the indicated calculation.
-
Selected accounts and related amounts for Gloucester Co. for the fiscal year ended August 31, 2014, are presented in Problem 5-5A. In Problem 5-5A, the following selected accounts and their current...
-
a. Using the information given . prepare the March income statement for Digital Vibe Manufacturing Company . Refer to the Amount Descriptions list provided for the exact wording of the answer choices...
-
Assume that an account with a recorded balance of $ 5,000 has an audited balance of $ 3,000. By using monetary unit sampling, if the sampling interval is $ 1,500, the projected misstatement would be...
-
The one-dimensional plane wall of Figure 3.1 is of thickness L = 75 mm and thermal conductivity k = 5W/m K. The fluid temperatures are T ,1 = 200C and T ,2 = 100C, respectively. Using the minimum...
-
Dry air is inhaled at a rate of 10 liter/min through a trachea with a diameter of 20 mm and a length of 125 mm. The inner surface of the trachea is at a normal body temperature of 37C and may be...
-
Indicate how the following transaction is entered into the U.S. balance of payments with double-entry bookkeeping: (a) The U.S. government gives $100 worth of food aid to a developing nation. (b)...
-
ancient Chinese sage named Lao Tsu: "Leave the people to themselves, no laws and inner goodness will flourish". "The more laws and commands there are, the more thieves and robbers will be". Do you...
-
1. A country's census report provides the following assessment of the number of academic years of graduate education completed by people of 25 years or older. # of Academic #s in Thousands of People...
-
A small Aircraft is flying between Toronto Island and Pearson Airport describing a displacement D=28.3 Km (N62 W) The wind blows uniformly Towards the West at 8.2 m/s. If the Speed of the Aircraft...
-
Construction contract is often known as an advanced form of contract. (a) Give an account with examples to the purposes of these advance features. (b) Describe the advance features under - i....
-
A CNG ( compressed natural gas ) tank for a mass transit bus is being pressure tested with nitrogen gas to confirm its strength and its ability to hold the CNG without leaking. The test was started...
-
Creative Construction Toys Corp. is using a costs-of-quality approach to evaluate design engineering efforts for a new toy robot. The company's senior managers expect the engineering work to reduce...
-
What are the main distinctions between the different schools of legal interpretation?
-
For laminar free convection from a heated vertical surface, the local convection coefficient may be expressed as hx = Cx-1/4, where h, is the coefficient at a distance x from the leading edge of the...
-
A circular, hot gas jet at T is directed normal to a circular plate that has radius ro and is maintained at a uniform temperature Ts. Gas flow over the plate is axisymmetric, causing the local...
-
Parallel flow of atmospheric air over a flat plate of length L = 3 m is disrupted by an array of stationary rods placed in the flow path over the plate. Laboratory measurements of the local...
-
AirQual Test Corporation provides on-site air quality testing services. The company has provided the following cost formulas and actual results for the month of February: Fixed Component per Month....
-
The monthly salaries for December and the year-to-date earnings of the employees of Bush Consulting Company as of November 30 follow. Determine the amount of social security tax to be withheld from...
-
Kathy Burnett works for Triumph Industries. Her pay rate is $13.32 per hour and she receives overtime pay at one and one-half times her regular hourly rate for any hours worked beyond 40 in a week....
Study smarter with the SolutionInn App