Consider a very deep triangular duct (deep in the direction perpendicular to the plane of the...

Consider a very deep triangular duct (deep in the direction perpendicular to the plane of the
paper) made of diffuse gray walls. The cross section of the duct forms an equilateral triangle of
sides 1.5 m each. Two surfaces of the duct namely surface 1 and surface 2 have emissivities 0.4
and 0.6 and are maintained at 1200 K and 800 K respectively, while the third surface (surface
3) is radiatively insulated (re-radiating) and has an emissivity of 0.5. For the two dimensional
triangular enclosure as described above, answer the following:
(a) Calculate the total number of view factors and determine the view factor matrix
(b) Determine the net radiation heat transfer from surface 1
(c) Determine the temperature of surface 3
(d) If the emissivity of surface 3 is changed, how will your result change?

Solutions

Expert Solution

Let us try understanding this and let me know your queries.

samet mamat answered 7 months ago

Next > < Previous

Related Solutions

The loop is in a magnetic field 0.22 T whose direction is perpendicular to the plane...

The loop is in a magnetic field 0.22 T whose direction is perpendicular to the plane of the loop. At t = 0, the loop has area A = 0.285 m2.Suppose the radius of the elastic loop increases at a constant rate, dr/dt = 3.45 cm/s . A) Determine the emf induced in the loop at t = 0 and at t = 1.00 s . Express your answer using two sifnificant figures E(0) = mV B) Express your answer...

Show that in a cubic crystal [HKL] direction is always perpendicular to a plane whose Miller...

Show that in a cubic crystal [HKL] direction is always perpendicular to a plane whose Miller indices are (HKL). Show the general proof and not example of specific plane and direction.

Prove that in a cubic crystal, a direction [hkl] is perpendicular to the plane (hkl) having the same indices.

A magnetic field is along the xy plane and the z plane is perpendicular to the...

A magnetic field is along the xy plane and the z plane is perpendicular to the magnetic field. In which plane(s) is the magnetic flux the greatest? Please explain.

A) Find the equation of the plane that passes through (2, -1,3) and is perpendicular to...

A) Find the equation of the plane that passes through (2, -1,3) and is perpendicular to the line x = 2-3t, y = 3 + t, z = 5t B) Find the equation where the planes 2x-3y + z = 5 and x + y-z = 2 intersect. C) Find the distance from the point (2,3,1) to the x + y-z = 2 plane. D) Find the angle between the planes x + y + z = 1 and x-2y...

Two long, straight wires are perpendicular to the plane of the paper and at a distance...

Two long, straight wires are perpendicular to the plane of the paper and at a distance 0.2 m from each other, as shown in the figure. The wires carry currents of I1 = 2.6 A and I2 = 5 A in the direction indicated (out of the page). Find the magnitude and direction of the magnetic field (in µT) at a point A midway between the wires. You need to indicate the direction with a positive or a negative value...

With a plane wave, I always took the direction of the wavevector, k, as the direction...

With a plane wave, I always took the direction of the wavevector, k, as the direction of propogation (magnitude proportional to the inverse wavelength). Alternatively, it could represent the momentum (minus a factor ?) of a particle. However inside a crystal, the electron wavevector and the electron velocity are not necessarily in the same direction. I'm thinking here of a 2D material with a cylindrical Fermi surface where the momentum may have a z component, but the Fermi velocity does...

The cart rolls down an incline. The launcher fires the ball in a direction perpendicular to...

The cart rolls down an incline. The launcher fires the ball in a direction perpendicular to the cart. Show that the ball lands back in the cart.

Imagine a bar magnet, with North and South poles, moving in the direction perpendicular to a...

Imagine a bar magnet, with North and South poles, moving in the direction perpendicular to a single loop of wire on the horizontal plane, as shown below. Show the directions of current induced in the coil using arrows and explain why. a. Magnet moving toward the coil. b. Magnet moving away from the coil.

Find a vector perpendicular to the line 2y=5-3x in the xy-plane.

Subjects