EXERCISE 3.20 Consider the problem ut =u" + u for u(0,t) u(1, t) 0, u(x,0) f(x). ze(0, 1), t>0, S...
Problem 5: Consider the initial value / Dirichlet problem ut(t, x) – 2uzz(t, x) = et, (t, x) € (0, +00)?, u(0, 2) = 1, u(t,0) = e- For the unique solution u(x, t) find the following limit as a function of t: (8 points) lim u(x, t). 2+
Problem 5: Consider the initial value Dirichlet problem ut(t, x) – 2uxx(t, x) = et, (t, x) € (0, +00)?, u(0,x) = 1, u(t,0) = e- For the unique solution u(x, t) find the following limit as a function of t: (8 points) lim u2, t). +00
Problem 1. Consider the nonhomogeneous heat equation for u,t) ut = uzz + sin(2x), 0<x<π, t>0 subject to the nonhomogeneous boundary conditions u(0, t) t > 0 u(n, t) = 0, 1, - and the initial condition Lee) Find the solution u(z, t) by completing each of the following steps: (a) Find the equilibrium temperature distribution ue(x). (b) Denote v(x, t) u(a, t) - e(). Derive the IBVP for the function v(x,t). (c) Find v(x, t) (d) Find u(, t)...
Problem 4: Consider the following problem for the heat equation (1) (2) (3) ut= Uxa + s(t), xE (0,1), t > 0 u(0, t) 2, u(1, t) = 4 и (х, 0) — 2(1 — х). where s(t) describes the source term (a) Find a series solution for u(x, t) with s(t) = e"1. (b) What is the convergence criteria for the transient extension function if s(t) = 0. Problem 4: Consider the following problem for the heat equation (1)...
Problem 4: Consider the following problem for the heat equation (1) (2) (3) ut= Uxa + s(t), xE (0,1), t > 0 u(0, t) 2, u(1, t) = 4 и (х, 0) — 2(1 — х). where s(t) describes the source term (a) Find a series solution for u(x, t) with s(t) = e"1. (b) What is the convergence criteria for the transient extension function if s(t) = 0. Problem 4: Consider the following problem for the heat equation (1)...
4. (*) Solve the Cauchy problem Ut = 3Uxx, X E R, t> 0, u(x,0) = Q(x), x E R, for the following initial conditions and write the solutions in terms of the erf function. LS 2, -4 < x < 5 (a) $(x) = { 0, otherwise. (b) (x) = e-la-11 Note: In (b) complete the square with respect to y in the exponent of e to obtain a nice form. You need to split your integral based on...
1 point) Solve the nonhomogeneous heat problem ut=uxx+4sin(2x), 0<x<π,ut=uxx+4sin(2x), 0<x<π, u(0,t)=0, u(π,t)=0u(0,t)=0, u(π,t)=0 u(x,0)=5sin(5x)u(x,0)=5sin(5x) u(x,t)=u(x,t)= Steady State Solution limt→∞u(x,t)=limt→∞u(x,t)= Please show all work. (1 point) Solve the nonhomogeneous heat problem Ut = Uxx + 4 sin(2x), 0< x < , u(0,1) = 0, tu(T, t) = 0 u(x,0) = 5 sin(52) u(a,t) Steady State Solution limt u(x, t) = Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts...
7. (a) Find the solution of the heat conduction problem: Suxx = ut, 0<x< 5, u(0, 1) = 20, tu(5, 1) = 80, 1>0 u(x,0) = f(x) = 12x + 20 + 13sin(tor) - 5sin(3 tex). (b) Find lim u(2, t). (c) If the initial condition is, instead, u(x,0) = 10x – 20 + 13sin( Tox) - 5sin(3 7ox), will the limit in (b) be different? What would the difference be?
15. Consider the initial value problem Ut + uur = 0, IER, t > 0, S 1-22, 251, u(3,0) = 10 (x) > 1. Sketch the characteristic diagram. At what time ty does the wave break? Find a formula for the solution.
Find a formula for the solution of the initial value problem for for t>0, -oc < x < oo ut = uzz-u a(1:0) = g(z) -x < 1 < x where g is continuous and bounded.( Hint: use v(x, t) = et u(z. t).) Find a formula for the solution of the initial value problem for for t>0, -oc