sample_exam_questions_4

sample_exam_questions_4 - CE 335 Old exam questions (with...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CE 335 Old exam questions (with solutions following) for Chapters 19-22 1] The following differential equation represents the concentration c of a chemical in an effluent stream, as a function of distance x from the discharge point: Dc'' - Uc' - Kc = 0 where D is the diffusivity, U is the fluid velocity, and K is the loss rate of the chemical due to oxidation. Define c 0 , c 1 , c 2 , . .. to be the concentrations when x = 0, 1, 2, . .. respectively. (a) Given the boundary conditions c 0 = 8 and c 10 = 2, write a system of linear equations for the unknown concentrations c 1 , c 2 , . .., c 9 by replacing the derivatives c' and c'' in the equation above with their second-order-accurate centered finite difference approximations. Assume that D, U, and K are constant and known. (b) What characteristic of this linear system makes its solution particularly simple to compute? 2] The volume rate of flow (m 3 / s) through a pipe that drains the bottom of a hemispheric pond is given by Q = π /4 D 2 (2g(h + d))
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

sample_exam_questions_4 - CE 335 Old exam questions (with...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online