class8_Conservation_of_Mass

# Class8_Conservation_ - have information or need a solution • Try to pick velocity vector and unit normal vector in the same direction • You

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9/21/2007 1 ES330, Section 2 Dr. Douglas Bohl 239 Camp x6683, [email protected] www.clarkson.edu/~dbohl/es330 Computer simulation Of temperature field Of a ???????? Laboratory for Computational Science and Engineering University of Minn.

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2 Outline • The Conservation of Mass – Equation from the RTT – Simplifications – Examples • Learning Objective: Be able to solve the mass flow through a control volume using the integral conservation of mass • HW#4 is posted on the web. • HW#3 is Due next Tuesday
3 Types of Control Volumes •F i x e d : • Moving: • Deforming:

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4 Moving Control Volumes
5 Rules for Control Volumes • You must draw it!!! • Look at problem and see where you have information and where you need answers • Pick Control Surfaces where you either

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Unformatted text preview: have information or need a solution • Try to pick velocity vector and unit normal vector in the same direction • You must draw it!!!!!!!!! 6 The Conservation of Mass 7 8 9 Example Water at 20° C flows through the contraction shown. The mass flow rate is 40 kg/s. The D 1 is 18 cm and D 2 is 5 cm. What are the average velocities at 1 and 2? 1 2 10 11 Example A hydraulic jump is in place downstream from a spillway as shown in the figure. Upstream of the jump the depth of the stream is 0.6 ft and the average velocity is 18 ft/s. Just downstream of the jump the average velocity is 3.4 ft/s. Calculate the height of the stream, h, just downstream of the jump. 12...
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## This note was uploaded on 04/07/2008 for the course ES 330 taught by Professor Bohl during the Spring '08 term at Clarkson University .

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Class8_Conservation_ - have information or need a solution • Try to pick velocity vector and unit normal vector in the same direction • You

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