Download e-book for iPad: An Introduction to Computational Fluid Mechanics by Example by Sedat Biringen

By Sedat Biringen

ISBN-10: 0470102268

ISBN-13: 9780470102268

This new publication builds at the unique vintage textbook entitled: An advent to Computational Fluid Mechanics by way of C. Y. Chow which was once initially released in 1979. within the a long time that experience handed in view that this e-book used to be released the sphere of computational fluid dynamics has visible a few adjustments in either the sophistication of the algorithms used but additionally advances within the desktop and software program on hand. This new publication comprises the most recent algorithms within the answer options and helps this by utilizing a variety of examples of functions to a huge diversity of industries from mechanical and aerospace disciplines to civil and the biosciences. the pc courses are constructed and on hand in MATLAB. moreover the middle textual content offers updated resolution equipment for the Navier-Stokes equations, together with fractional step time-advancement, and pseudo-spectral tools. the pc codes on the following site: www.wiley.com/go/biringen

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Example text

2. The program is constructed so that the fluid velocity components uf and vf are specified in the function subprograms FX and FY instead of in the main program. In the present problem both components are zero. The subprograms can easily be modified to describe any steady or unsteady wind fields. 1 50 100 150 x (m) 200 250 300 Trajectories of a sphere in air (solid lines) and those in vacuum (dashed lines). 4, and the resultant trajectories are plotted in Fig. 1 for comparison. It shows that air resistance reduces both the range and the maximum height of a projectile.

4 in the next section. To use the subprogram, one needs only to attach it to the main program and define in two separate subprograms the functions F1 and F2 . The usage will be demonstrated in some of the following programs. 5 BALLISTICS OF A SPHERICAL PROJECTILE It is well known that in small-scale motions a projectile traces out a parabola when shooting upward in a direction not perpendicular to the earth’s surface. But this conclusion is derived by considering trajectories in a vacuum. 1). If the sphere does not rotate, f becomes the viscous drag in the direction of the relative velocity wr , which makes an angle ϕ with the x axis.

11) form a system of two simultaneous first-order ordinary differential equations. 12) the solution can be obtained using the fourth-order Runge-Kutta method. 13) x = x + 16 ( 1x +2 2x +2 3x + 4x ) y = y + 16 ( 1y +2 2y +2 3y + 4 y) This numerical integration procedure is programmed in a subprogram named in which the names XNEXT and YNEXT are used, respectively, for x and y . As an alternative, we also implement ODE45 MATLAB initial value solver for this problem. Plots of numerical results are obtained by using MATLAB plotting routines.

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An Introduction to Computational Fluid Mechanics by Example by Sedat Biringen


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