4) The one-dimensional heat equation is du 02u at = k→ ot ar 2 Where u(x,t)is...
(a) Consider the one-dimensional heat equation for the temperature u(x, t), Ou,02u where c is the diffusivity (i) Show that a solution of the form u(x,t)-F )G(t) satisfies the heat equation, provided that 护F and where p is a real constant (ii) Show that u(x,t) has a solution of the form (,t)A cos(pr)+ Bsin(p)le -P2e2 where A and B are constants (b) Consider heat flow in a metal rod of length L = π. The ends of the rod, at...
(a) The temperature distribution u(x, t) of the one- dimensional silver rod is governed by the heat equation as follows. du a²u at ar? Given the boundary conditions u(0,t) = t?, u(0.6, t) = 5t, for Osts 0.02s and the initial condition u(x,0) = x(0.6 – x) for 0 SX s 0.6mm, analyze the temperature distribution of the rod with Ax = 0.2mm and At = 0.01s in 4 decimal places. (10 marks)
Consider a 2 m long metal rod. The temperature u(z,t) at a point along the rod at any time t is found by solving the heat equation k where k is the material property. The left end of the rod ( 0) is maintained at 20°C and the right end is suddenly dipped into snow (0°C). The initial temperature distribution in the rod is given by u(x,0)- (i) Use the substitution u(z,t) ta,t)+20-10z to reduce the above problem to a...
Solve heat equation in a rectangle du = k ( ou + dou), 0<x<t, 0<y< 1, t> 0 u(x, 0, 1) = 0, uy(x,1,1) = 0, with boundary conditions u(O, y,t) = 0, u(r, y, t) = 0, and initial condition u(x, y,0) = (y – į v?) sin(2x).
อาน 02u (a) A two-dimensional plate covering the region -1 5 x 51, 0 Sy s 1 has a temperature profile which satisfies the heat equation ди 10 + at l@x2' ay Find the value of a such that u(x,y,t) = 60 – 40x + e-at sin(21x) + e-try sin(atx) is a solution to this problem. Give the formula for the steady state part of this solution.
1. Consider the Partial Differential Equation ot u(0,t) = u(r, t) = 0 a(x, 0)-x (Y), sin (! We know the general solution to the Basic Heat Equation is u(z,t)-Σ b e ). n= 1 (b) Find the unique solution that satisfies the given initial condition ur, 0) -2. (Hint: bn is given by the Fourier Coefficients-f(z),sin(Y- UsefulFormulas/Facts for PDEs/Fourier Series 1)2 (TiT) » x sin aL(1)1 a24(부) (TiT) 1)+1 0 1. Consider the Partial Differential Equation ot u(0,t) =...
PROBLEM 4.3. The one-dimensional wave equation is ə?u - 20u = 0, ət2 or where c> 0 is constant. Show that any function of the form u(x, t) = f(x - ct)+9(2+ct), where f,g: RR are twice continuously differentiable, satisfies this equation. Explain why we call c the wave speed.
For : U(x,0) = Sin(ax) a= 2.6 using the Explicit Forward Euler and Crank-Nicholson methods. Example 92. One-Dimensional Parabolic PDE: Heat Flow Equation. Consider the parabolic PDE d-u(x, t) du(x, t) 0t with the initial condition and the boundary conditions (E9.2.2) We were unable to transcribe this image Example 92. One-Dimensional Parabolic PDE: Heat Flow Equation. Consider the parabolic PDE d-u(x, t) du(x, t) 0t with the initial condition and the boundary conditions (E9.2.2)
6. a) For a thin conducting rod of length L = π, the temperature U(x, t) at a point 0 Sx S L at timet>0 is determined by the differential equation U, Uxx with boundary data U(x, 0) fx) and U(0,) UL, t)- 0 for all0. Show that for any positive integer k, the function U(x, t)- exp (-ak21) sin kx is a solution. It follows that Σ exp (-ak2 t) Bk sin kx is the general solution where Σ...
Solve the equation for u(x, t) if it satisfies the equation: with boundary and initial conditions given by where δ(x) and δ(t) are Dirac delta functions. 2. du-Ka_ = δ(x-a)s(t) for 0 < x < oo; t > 0 at ах? du ах (0, t) = 0;u(co, t) =0;(mt) = 0; u(x, 0)=0 ox Solve the equation for u(x, t) if it satisfies the equation: with boundary and initial conditions given by where δ(x) and δ(t) are Dirac delta functions....