1. The velocity profile for a film of liquid flowing down a vertical wall driven by gravity is given by U=(Lx -0.5x²) (pg/μ) Where, L is the thickness of the film, U is the downward velocity, x is the distance perpendicular to the wall, p is liquid density, and u is liquid viscosity. Sketch the velocity profile. • • Find the volume flow rate for a layer of water 2 cm thick flowing down a wall 175 cm wide at a temperature of 25°C. Calculate the expression for volume flow rate and the bulk velocity. How is the bulk velocity related to the maximum velocity?
1. The velocity profile for a film of liquid flowing down a vertical wall driven by gravity is given by U=(Lx -0.5x²) (pg/μ) Where, L is the thickness of the film, U is the downward velocity, x is the distance perpendicular to the wall, p is liquid density, and u is liquid viscosity. Sketch the velocity profile. • • Find the volume flow rate for a layer of water 2 cm thick flowing down a wall 175 cm wide at a temperature of 25°C. Calculate the expression for volume flow rate and the bulk velocity. How is the bulk velocity related to the maximum velocity?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Help me with the second and third point. I am not sure which eqn to use. Thank you.
Transcribed Image Text:1. The velocity profile for a film of liquid flowing down a vertical wall driven by gravity
is given by
U=(Lx -0.5x²)(pg/μ)
Where,
L is the thickness of the film,
U is the downward velocity,
x is the distance perpendicular to the wall,
p is liquid density, and
u is liquid viscosity.
Sketch the velocity profile.
•
•
Find the volume flow rate for a layer of water 2 cm thick flowing down a wall 175 cm
wide at a temperature of 25°C.
Calculate the expression for volume flow rate and the bulk velocity. How is the bulk
velocity related to the maximum velocity?
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