By Edwin Zondervan

ISBN-10: 1482229447

ISBN-13: 9781482229448

"This publication emphasizes the deriviation and use of a number of numerical tools for fixing chemical engineering difficulties. The algorithms are used to unravel linear equations, nonlinear equations, traditional differential equations and partial differential equations. it's also chapters on linear- and nonlinear regression and ond optimizaiton. MATLAB is followed because the programming surroundings during the book.�Read more...

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**Extra info for A numerical primer for the chemical engineer**

**Example text**

Back substitution is more efficient than row operations, so maybe there are more efficient ways to end up with triangular matrices. 4 LU factorization Suppose that we would like to solve the previous system, but with three different right-hand sides: Ax1 = b1 , Ax2 = b2 , Ax3 = b3 . 12 as one system: .. .. .. . . . . = b1 b2 b3 . 13) 1 2 3 .. .. .. . . . By Gaussian elimination and U , so that A11 A12 A21 A22 A31 A32 we could factor the matrix A into two matrices, L A13 1 A23 = ⋆ A33 ⋆ 0 0 ⋆ 1 0 0 ⋆ 1 0 ⋆ ⋆ ⋆ ⋆ .

The exponent e is always an integer. The part between brackets is called the mantissa. Notice that c1 is always 1. We have to choose the exponent e in such a way that the first nonzero digit corresponds to 2e−1 . The total number of available positions, λ + 1, has to be divided: the sign requires one position, the mantissa requires m − 1 positions, so the exponent has only λ−m+1 positions. Ergo, the maximum value for the exponent equals 2λ−m − 1; the minimum value equals −2λ−m + 1. Just as with the integer representation, there is an upper and lower margin, and values outside these margins cannot be represented.

5 With LU decomposition, we produce matrices that are less sparse than the original matrix methods. In the early days of computing, iterative methods were important because memory was limited. There are several iterative methods available. For example, the Jacobi method, the Gauss-Seidel method, and successive over relaxation. , MathWorks, by typing help bicg or going to the MathWorks Web site). In this chapter we will look at one method, the Jacobi method. 5 The Jacobi method As you remember, we derived an equation for steady-state heat conduction earlier: Tk−N x + Tk−1 − 4Tk + Tk+1 + Tk+N x = 0.