Engineering, 29.11.2019 06:31 lnc0500

Functionally graded materials are intentionally fabricated to establish a spatial distribution of properties in the final product. consider an l × l two-dimensional object with l = 20 mm. the thermal conductivity distribution of the functionally graded material is k(x) = 25 w/m·k +(9010 w/m5/2·k) x3/2. two sets of boundary conditions, denoted as cases 1 and 2, are applied.

(a) determine the spatially averaged value of the thermal conductivity k¯ . use this value to estimate the heat rate per unit length for cases 1 and 2.

(b) using a grid spacing of 2 mm, determine the heat rate per unit depth for case 1.

(c) using a grid spacing of 2 mm, determine the heat rate per unit depth for case 2.

Answers: 3

Show answers

Another question on Engineering

Engineering, 03.07.2019 14:10

If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

Answers: 3

Answer

Engineering, 04.07.2019 18:10

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Answers: 3

Answer

Engineering, 04.07.2019 18:10

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.

Answers: 3

Answer

You know the right answer?

Functionally graded materials are intentionally fabricated to establish a spatial distribution of pr...

Questions