A fluid flows between two parallel plates held at temperature zero. At the inlet, fluid temperature is To and initially the fluid is at temperature T₁. If V is the speed of the fluid in the x direction, a problem describing the temperature u(x, y, t) is: du Ət + V = = μ², for n ди J²u მყ2 k- Əx - x > 0, 0 0, u(x, 0, t) = 0, u(x, b, t) = 0, u(0, y, t) = To, u(x, y,0) = T₁. Make a separation of variables as above. State and solve the eigenvalue problem for Y. Show that Page 1 of 2 H²k(x+Vt) un (x, y, t) = n(x – Vt)e¯ where An = : 1, 2, 3,... are the eigen values for the Y problem, satisfies the PDE and boundary conditions at y = 0 and y = b, without restrictions of n (except differentiability). 2V sin ny

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A fluid flows between two parallel plates held at temperature zero. At the inlet, fluid
Page 1 of 2
temperature is To and initially the fluid is at temperature T1. If V is the speed of the
fluid in the x direction, a problem describing the temperature u(x, y, t) is:
ng
+V
Ət
ди
= k
x > 0, 0< y < b, t> 0,
u(г, 0, t) — 0, и(х, b, t) —D 0,
u(0, у, t) — То, и (1, у, 0) — Tі.
Make a separation of variables as above. State and solve the eigenvalue problem for Y
Show that
Un (T, Y, t) = ¢n(x – Vt)e
k(z+Vt)
2V
sin lny
where An = u, for n =
PDE and boundary conditions at y = 0 and y
differentiability).
1, 2, 3, ... are the eigen values for the Y problem, satisfies the
b, without restrictions of on (except
Transcribed Image Text:A fluid flows between two parallel plates held at temperature zero. At the inlet, fluid Page 1 of 2 temperature is To and initially the fluid is at temperature T1. If V is the speed of the fluid in the x direction, a problem describing the temperature u(x, y, t) is: ng +V Ət ди = k x > 0, 0< y < b, t> 0, u(г, 0, t) — 0, и(х, b, t) —D 0, u(0, у, t) — То, и (1, у, 0) — Tі. Make a separation of variables as above. State and solve the eigenvalue problem for Y Show that Un (T, Y, t) = ¢n(x – Vt)e k(z+Vt) 2V sin lny where An = u, for n = PDE and boundary conditions at y = 0 and y differentiability). 1, 2, 3, ... are the eigen values for the Y problem, satisfies the b, without restrictions of on (except
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