Fundamentals of Thermal-Fluid Sciences
5th Edition
ISBN: 9780078027680
Author: Yunus A. Cengel Dr., Robert H. Turner, John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 15, Problem 1P
To determine
The change of local friction coefficient with position.
Expert Solution & Answer
Explanation of Solution
The local friction coefficient accounted to calculate the drag force at specific location. The variation in the velocity of the boundary layer in the flow direction causes the local friction coefficient to vary along the surface of the flat plate. The local friction coefficient is denoted as
The variation of local friction coefficient with the position for the laminar flow along the flat plate is shown in below figure.
The local friction coefficient
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Two channels and two plates are used to formthe column section shown. For b = 200 mm,determine the moments of inertia and theradii of gyration of the combined section withrespect to the centroidal x and y axes.For the section of problem, determine thefirst moment of the upper plate about thecentroidal x-axis
Determine by direct integration the moment of inertia of theshaded area at right with respect to the x axis shown.
Determine by direct integration the moment of inertia of theshaded area of the figure with respect to the y axis shown.
For the following MATLAB code, I need to answer a few questions. Can you identify the curves as elliptic functions? Which curves reflect the sn, cn, and dn functions?From the curves, determine the maximum amplitudes and the period corresponding toeach angular velocity component.
clc;
clear all;
I = [500; 125; 425];
w = [0.2; 0.1; 0.2];
rev = 0:0.01:10;
C = eye(3);
% Using ode45 to integrate the KDE and DDE
options = odeset('RelTol',1e-9,'AbsTol',1e-9);
result = ode45(@K_DDE, rev, [w; I; C(:)], options);
v = result.x;
% Extracting information from the ode45 solver
w = result.y(1:3, :);
C_ode = reshape(result.y(7:end, :), [3,3,length(v)]);
plot(v, w)
xlabel('rev')
ylabel('w (rad/s)')
legend('w1', 'w2', 'w3')
% Functions
function dwCdt = K_DDE(~, w_IC)
% Extracting the initial condtions to a variable
w = w_IC(1:3);
I = w_IC(4:6);
C = reshape(w_IC(7:end), [3, 3]);
I1 = I(1);
I2 = I(2);
I3 = I(3);
K1 = -(I3-I2)/I1;
K2 = -(I1-I3)/I2;
K3 = -(I2-I1)/I3;
%…
Chapter 15 Solutions
Fundamentals of Thermal-Fluid Sciences
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Ch. 15 - Prob. 11PCh. 15 - What is the difference between skin friction drag...Ch. 15 - Prob. 13PCh. 15 - What is the effect of streamlining on (a) friction...Ch. 15 - What is flow separation? What causes it? What is...Ch. 15 - Prob. 16PCh. 15 - Prob. 17PCh. 15 - Prob. 18PCh. 15 - The resultant of the pressure and wall shear...Ch. 15 - Prob. 20PCh. 15 - Prob. 21PCh. 15 - Prob. 22PCh. 15 - Prob. 24PCh. 15 - Prob. 25PCh. 15 - Prob. 26PCh. 15 - Prob. 27PCh. 15 - A submarine can be treated as an ellipsoid with a...Ch. 15 - Prob. 29PCh. 15 - During major windstorms, high vehicles such as RVs...Ch. 15 - Prob. 31PCh. 15 - Prob. 32PCh. 15 - Prob. 33PCh. 15 - Prob. 34PCh. 15 - Prob. 35PCh. 15 - Prob. 36PCh. 15 - Prob. 37PCh. 15 - Prob. 38PCh. 15 - Prob. 39PCh. 15 - Prob. 40PCh. 15 - Prob. 41PCh. 15 - Prob. 42PCh. 15 - Prob. 43PCh. 15 - Prob. 44PCh. 15 - Prob. 45PCh. 15 - Prob. 46PCh. 15 - Prob. 48PCh. 15 - Prob. 49PCh. 15 - Prob. 51PCh. 15 - Prob. 52PCh. 15 - Prob. 53PCh. 15 - Prob. 54PCh. 15 - Prob. 55PCh. 15 - Prob. 56PCh. 15 - Prob. 57PCh. 15 - Prob. 58PCh. 15 - Prob. 59PCh. 15 - Prob. 60PCh. 15 - Prob. 61PCh. 15 - Prob. 62PCh. 15 - A 2-m-long, 0.2-m-diameter cylindrical pine log...Ch. 15 - Prob. 64PCh. 15 - Prob. 65PCh. 15 - Prob. 66PCh. 15 - Prob. 67PCh. 15 - Prob. 68PCh. 15 - Prob. 69PCh. 15 - Prob. 70PCh. 15 - Prob. 71PCh. 15 - Prob. 72PCh. 15 - What is induced drag on wings? Can induced drag be...Ch. 15 - Prob. 74PCh. 15 - Prob. 75PCh. 15 - Prob. 76PCh. 15 - Prob. 77PCh. 15 - Consider an airplane whose takeoff speed is 220...Ch. 15 - Prob. 79PCh. 15 - Prob. 80PCh. 15 - Prob. 82PCh. 15 - Prob. 83PCh. 15 - Prob. 84PCh. 15 - Prob. 85PCh. 15 - Prob. 86RQCh. 15 - A 1.2-m-external-diameter spherical tank is...Ch. 15 - Prob. 88RQCh. 15 - Prob. 89RQCh. 15 - Prob. 91RQCh. 15 - Prob. 92RQCh. 15 - Prob. 93RQCh. 15 - Prob. 94RQCh. 15 - Prob. 95RQCh. 15 - Prob. 96RQCh. 15 - Prob. 97RQCh. 15 - Prob. 98RQCh. 15 - Prob. 99RQCh. 15 - Prob. 100RQCh. 15 - Prob. 102RQ
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