Q1. A viscous, incompressible fluid flows between the two infinite, vertical, parallel plates of the Fig. Determine, by use of the Navier-Stokes equations, an expression for the pressure gradient in the direction of flow. Express your answer in terms of the mean velocity. Assume that the flow is laminar, steady, and uniform. with the coordinate system shown u= 0, w=o and from the continuity equation ou = "=0. Thus, from the y-component of the Navier-Stokes equations (Eg. 6.1276), with gy = -2, d²u -35-pg + M dx² (1) 0 = Since the pressure is not a function of x, Eq. (1) can be written as d²= P dx² pe (where P = 2 +pg) and integrated to obtain P du = x + C₁ From symmetry du = of Eg. (2) yields The flowrate at x=0 =0 P4²³ + C₂ Since at x=±h, v=0 it follows that and therefore P مار it follows that V= 2h 30 That per P = f*dx = √² + (x²³h²³) dx = -² 2£³ 2μ h h Direction of flow Thus, with V (mean velocity ) given by the equation. 1 PR² 3μ = v= (x²-1²) unit width in the Z-direction can be expressed as C₁=0. Integration (₂= - 12/12 (4²) 38=-344 - pg ap ay h (2)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
icon
Related questions
Question

answer is given but can you please explain everything clearly and why P is not a function of x, and how they got what.

Thank you

Q1.
A viscous, incompressible fluid flows between the two infinite,
vertical, parallel plates of the Fig. Determine, by use of the
Navier-Stokes equations, an expression for the pressure gradient
in the direction of flow. Express your answer in terms of the mean
velocity. Assume that the flow is laminar, steady, and uniform.
with the coordinate system shown u= 0, w=o and from the
continuity equation ou =
"=0. Thus, from the y-component
of the Navier-Stokes equations (Eg. 6.1276), with gy = -2,
d²u
-35-pg + M dx²
(1)
0 =
Since the pressure is not a function of x, Eq. (1) can
be written as
d²= P
dx² pe
(where P = 2 +pg) and integrated to obtain
P
du = x + C₁
From symmetry du =
of Eg. (2) yields
The flowrate
at x=0
=0
P4²³ + C₂
Since at x=±h, v=0 it follows that
and therefore
P
مار
it follows that
V= 2h
30 That
per
P
= f*dx = √² + (x²³h²³) dx = -² 2£³
2μ
h
h
Direction of flow
Thus, with V (mean velocity ) given by the equation.
1 PR²
3μ
=
v=
(x²-1²)
unit width in the Z-direction can be expressed as
C₁=0. Integration
(₂= - 12/12 (4²)
38=-344 - pg
ap
ay
h
(2)
Transcribed Image Text:Q1. A viscous, incompressible fluid flows between the two infinite, vertical, parallel plates of the Fig. Determine, by use of the Navier-Stokes equations, an expression for the pressure gradient in the direction of flow. Express your answer in terms of the mean velocity. Assume that the flow is laminar, steady, and uniform. with the coordinate system shown u= 0, w=o and from the continuity equation ou = "=0. Thus, from the y-component of the Navier-Stokes equations (Eg. 6.1276), with gy = -2, d²u -35-pg + M dx² (1) 0 = Since the pressure is not a function of x, Eq. (1) can be written as d²= P dx² pe (where P = 2 +pg) and integrated to obtain P du = x + C₁ From symmetry du = of Eg. (2) yields The flowrate at x=0 =0 P4²³ + C₂ Since at x=±h, v=0 it follows that and therefore P مار it follows that V= 2h 30 That per P = f*dx = √² + (x²³h²³) dx = -² 2£³ 2μ h h Direction of flow Thus, with V (mean velocity ) given by the equation. 1 PR² 3μ = v= (x²-1²) unit width in the Z-direction can be expressed as C₁=0. Integration (₂= - 12/12 (4²) 38=-344 - pg ap ay h (2)
AI-Generated Solution
AI-generated content may present inaccurate or offensive content that does not represent bartleby’s views.
steps

Unlock instant AI solutions

Tap the button
to generate a solution

Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY