Write the explicit dependance of xi on original variables

Reference no: EM131004401

Consider the transport equation u_t + 4u_x = 0. On the grid below sketch seven different characteristic curves for the equation. Let ξ be the characteristic variable. Write the explicit dependance of ξ on the original variables t,x. Set v(t, ξ) = u(t, x), and use the chain rule to compute u_x and u_y in terms of v, v_t, v_ξ, etc. Verify that the function v(t, ξ) satisfies the equation v_t = 0.

1874_Seven different characteristic curves.jpg

Reference no: EM131004401

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Write the explicit dependance of xi on original variables : Write the explicit dependance of ξ on the original variables t,x. Set v(t, ξ) = u(t, x), and use the chain rule to compute ux and uy in terms of v, vt, vξ, etc. Verify that the function v(t, ξ) satisfies the equation vt = 0.

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