How do the number and shape of fins of a bony fish differ from those of a shark?
3. A cooling system uses 8 copper cylindrical fins of diameter 6 mm and length 100 mm to dissipate heat. The surface around the fins is maintained at 150 °C, and the tips of the fins are insulated. Air at 50 °C is used to cool the fins, flowing at 5 m/s. The flows around the fins do not affect each other. (a) Determine the average convection coefficient around each fin. (b) Calculate the overall heat dissipation rate of the...
For an array of rectangular straight fins. For the first answer, find the efficiency of a single fin. For the second answer, find the efficiency of the array of fins, with the given parameters: L = 10 mm t = 2 mm, w = 5 mm qt = 100 watts k = 200 w/mk Tinf = 20C Tbase = 100C Prime area: Ab = 25 mm2 h = 500 w/m2k Number of fins in array: N = 50 ** if...
Consi der the control system illustrated in Figure P. 2 C(s) R(s) s t Ge(s) s(s 6)(s-1) PID controller Figure P. 2 Using Ziegler-Nichols tuning rules, obtain the PID controller gains.
QUESTION 2 In a study of the function of pectoral fins in fish, a graduate studen t examined 7 fish with the following lengths (in centimeters, cm). 30 28 29 27 31 22 29. What is the sample mean? QUESTION 3 In a study of the function of pectoral fins in fish, a graduate student examined7 fish with the following lengths (n centimeters, cm). 30 28 29 27 31 22 29 What is the median? QUESTION 4 Which of the...
QUESTION 2 In a study of the function of pectoral fins in fish, a graduate student examined 7 fish with the following lengths (in centimeters, cm). 30 28 29 27 31 22 29. What is the sample mean? QUESTION 3 In a study of the function of pectoral fins in fish, a graduate student examined 7 fish with the following lengths (in centimeters, cm). 30 28 29 27 31 22 29. What is the median? QUESTION 4 Which of the...
Question (1) (4 Points) In many industrial applications, fins are currently being used to increase the rate of heat transfer from hot surfaces. In one of these applications as shown in the figure below, a 0.3 mx 0.3 m hot surface at a base temperature of 125°C is cooled by attaching 2-cm-long, 0.1-cm-diameter met pin fins (k = 310 W/(mK)) to it, with a center-to-center distance of 0.3 cm. The temperature of the T = 35°C, and the heat transfer...
2. Straight metal fins (k = 100 W/m°C) with rectangular profile protrude from a l m high wall. The wall is maintained at 200 °C and exposed to a convection environment at 25°C with h = 20 W/m² °C. The fins have a length (L) of 8 cm and a thickness (1) of 3 mm. The space between two adjacent fins is 2 mm. Calculate the following for per unit depth of wall: (a) the fin efficiency, (8 points) (b)...
fins the critical value ta/2 that corresponds to 99% confidence level for a sample size n=15
finite element method
2. Aluminum fins with rectangular profiles (5 mm wide and 1 mm thick) are used to remove heat from a surface whose temperature is 150°C. The temperature of ambient air is 20°C. The thermal conductivity of aluminium is 168 W/m.K. The natural convective coefficient associated with the surrounding air is 35 W/m2.K. The fins are 150 mm long and the heat loss from the tip of the fin may be neglected. (a) Determine the temperature distribution along...