1. Question 1- Laplace Equation: Leibmann's Method The four sides of a square plate of side 12cm, made of homogenous material, are kept at a constant temperature 0°C and 100°C as shown in Figure 1. Using a grid of mesh 4cm and applying Leibmann's method, perform up to four (4) iteration to find the temperature at the various mesh points.
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- 1.63 Liquid oxygen (LOX) for the space shuttle is stored at 90 K prior to launch in a spherical container 4 m in diameter. To reduce the loss of oxygen, the sphere is insulated with superinsulation developed at the U.S. National Institute of Standards and Technology's Cryogenic Division; the superinsulation has an effective thermal conductivity of 0.00012 W/m K. If the outside temperature is on the average and the LOX has a heat of vaporization of 213 J/g, calculate the thickness of insulation required to keep the LOX evaporation rate below 200 g/h.8m long rod is at an initial temperature of 80c the left side of the rod is at temperature equal to 39c and the right side is at temperature equal to 68c thermal diffusivity is equal to 10^-4 and grid space is equal to 2m find the temperature distribution at 30_60_90 secondsA wall of a house is made from two layers of bricks enclosing a layer of insulation. A radiator is positioned to cover the whole internal surface, and used intermittently when the internal temperature is low. The external surface is exposed to the outside air. Which of the following assumptions could be used to identify the relevant reduced form of the conduction equation to find the temperature in the wall. a. Conduction is mainly in two directions. b. Conduction is mainly in one direction. c. The wall properties are homogeneous. d. Steady conditions exist. e. Unsteady conditions exist. f. There is an internal volumetric heat generation in the wall.
- Solve for the temperature distribution of a long, thin circular solid tube with a length of 10 cm (shown in Figure2), using the Finite Difference Method: Parabolic Equation (Explicit Method). The following values of the circular solid tube is as provided: k’= 0.49 cal/ (s · cm · oC), Δt = 0.1 s and Δx = 2 cm. When t = 0, the temperature of the circular solid tube is zero and the boundary conditions are fixed for all times at temperature T, at x = 0 cm is 100oC where as the temperature T, at x =10 is 50oC. From this information it is given that the circular solid rod is made of material with heat capacity, C = 0.2174 cal/(g· oC) and density (ρ) = 2.7 g/cm3. Use Explicit Method to solve this problem. Task: A Visual Basic of the FDM solution for (a) has been initially developed based on the required calculation of task Q2(a). The source code is as provided below (may need some minor tweak): Option Explicit Sub Explicit() Dim i As Integer, j As Integer, np As Integer, ns As Integer…Question: USE CRANCK NICKLISON METHOD TO Find the steady state temperature distribution at all points of a heated steel plate .The plate has 30 cm width and 30 cm in length . The edges of the sheet are kept at constant temperature: 100 , 80 , 60 ,40 degrees. Assume the sheet is divided into 3x3 grids.A 1-D conduction heat transfer problem with internal energy generation is governed by the following equation: +-= dx2 =0 W where è = 5E5 and k = 32 If you are given the following node diagram with a spacing of Ax = .02m and know that m-K T = 611K and T, = 600K, write the general equation for these internal nodes in finite difference form and determine the temperature at nodes 3 and 4. Insulated Ar , T For the answer window, enter the temperature at node 4 in Kelvin (K). Your Answer: EN SORN Answer units Pri qu) 232 PM 4/27/2022 99+ 66°F Sunny a . 20 ENLARGED oW TEXTURE PRT SCR IOS DEL F8 F10 F12 BACKSPACE num - %3D LOCK HOME PGUP 170
- In a grid of wires, the temperature at exterior mesh points is maintained at constant values as shown in the figure. When the grid is in thermal equilibrium, the temperature at each interior mesh point is the average of the temperatures at the four adjacent points. For instance, T2+ T3+0-80 4 T₁ = Find the temperatures T₁, T2, T3, T4, when the grid is in thermal equilibrium. T₁-80 T₂ = 80 T3= 80 T₁ = 0 ₂Please provide accurate answer with proper steps The wall of the furnace is 30.48 mm thick and is insulated from outside. Thermal conductivity of the wall material is 0.1 W/m K and the insulation material is 0.01 W/m K. The furnace operates at 650 0C and the ambient temperature is 30 0 Allowable temperature on the outer side of the insulation is 1000C. Determine the overall heat transfer by conduction per unit area occurring across a furnace wall made from clay. If the air side heat transfer coefficient is 0.4 W/m2 K, calculate the minimum insulation thickness requirement.The wall (thickness L) of a furnace is comprised of brick material (thermal conductivity, k = 0.2 Wm¯' K'). Given that the atmospheric temperature is 0°C at both sides of wall, the density (p) and heat capacity (c) of the brick material are 1.6 gm cm³ and 5.0 J kg K¯l respectively. du Solve pc = k- subject to initial conditions as u(x,0) = x²(L – x). ốt Consider the case 2=- p² only.
- Problem 4 A cork board (k = 0.039W/m K) 3 cm thick is exposed to air with an average temperature T.. = 30°C with a convection heat transfer coefficient, h = 25 W/m².K. The other surface of the board is held at a constant temperature of 15°C. A volumetric heat generation of 5 W/m³ is occurring inside the wall. Assuming one dimensional conduction, write the governing equation and express the boundary conditions for the wall. (solve the equation is not required) ProblomThe initial temperature distribution of a 5 cm long stick is given by the following function. The circumference of the rod in question is completely insulated, but both ends are kept at a temperature of 0 °C. Obtain the heat conduction along the rod as a function of time and position ? (x = 1.752 cm²/s for the bar in question) 100 A) T(x1) = 1 Sin ().e(-1,752 (³¹)+(sin().e (-1,752 (²) ₁ + 1 3π TC3 .....) 100 t + ··· ....... 13) T(x,t) = 200 Sin ().e(-1,752 (²t) + (sin (3). e (-1,752 (7) ²) t B) 3/3 t + …............) C) T(x.t) = 200 Sin ().e(-1,752 (²t) (sin().e(-1,752 (7) ²) t – D) T(x,t) = 200 Sin ().e(-1,752 (²)-(sin().e (-1,752 (²7) ²) t E) T(x.t)=(Sin().e(-1,752 (²t)-(sin().e(-1,752 (²) t+ t + ··· .........) t +.... t + ··· .........) …..)03 A thin rod of 3 cm length having a thermal diffusivity coefficient (a) of 0.835 cm²/s is initially kept at a temperature of 0 °C. The rod is insulated at all points except at its ends which are kept at all times at T(0) -5 °C and T(3) = 10 °C. Use the explicit method to solve for the temperature distribution in the rod at t= 0.2 second using the following information; Ax=1 cm, At = 0.1 second, and λ = a At/Ax².