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Analytical Methods for Heat Transfer and Fluid Flow Problems by Bernhard Weigand

By Bernhard Weigand

This e-book describes important analytical tools through employing them to real-world difficulties instead of fixing the standard over-simplified lecture room difficulties. The ebook demonstrates the applicability of analytical tools even for advanced difficulties and publications the reader to a extra intuitive figuring out of techniques and solutions.

Although the answer of Partial Differential Equations by way of numerical tools is the traditional perform in industries, analytical tools are nonetheless vital for the serious evaluation of effects derived from complicated computing device simulations and the development of the underlying numerical concepts. Literature dedicated to analytical tools, notwithstanding, frequently makes a speciality of theoretical and mathematical points and is for this reason dead to so much engineers. Analytical equipment for warmth move and Fluid move difficulties addresses engineers and engineering students.

The moment variation has been up to date, the chapters on non-linear difficulties and on axial warmth conduction difficulties have been prolonged. And labored out examples have been included.

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Extra resources for Analytical Methods for Heat Transfer and Fluid Flow Problems

Example text

100), the following relation for the function f ð~yÞ is obtained  f 00 ð~yÞ ¼ ÀK 1 2 y þ C1~y þ C2 ) f ð~yÞ ¼ À K~ 2 ð2:104Þ Since we need only one particular solution of the problem, we could set C1 and C2 equal to zero. However, a better choice is to select the constants C1 and C2 in such a way that the two boundary conditions Hp ð~x; 1Þ ¼ 0; Hp ð~x; À1Þ ¼ 0 are satisfied. If we do so, we obtain the following solution of the problem Hp ¼ À Á K 1 À ~y2 2 ð2:105Þ After having obtained the solution for Hp , one has to solve the following problem for Hh which is deduced from the Eqs.

The solution for ~t\~t1 remains unchanged. Let us assume that the solution of the problem can be expressed in the form H ¼ H ð~tÞGð~xÞ ð2:64Þ Introducing Eq. 64) can not result in a solution to the present problem, because the boundary condition for ~x ¼ 1 can not be satisfied if H ð~tÞ is an arbitrary function of ~t. Therefore, we conclude that we first have to make the boundary conditions homogenous, in order to find a solution with the help of Eq. 64). This can be done by splitting the solution into two parts H ¼ HS ð~xÞ þ HT ð~x; ~tÞ Fig.

Because these two expressions are identical if we that A ¼C  ¼ 0, only if ξ and η are both exchange ξ and η, we can achieve the condition A solutions of the following equation  2     2 @X @X @X @X A þ 2B ¼ 0; þC @x @x @y @y X ¼ n or g ð2:18Þ Along a curve Ω = const. one has dX ¼ @X @X dx þ dy ¼ 0 @x @y ) dy @X ¼À dx @x 0 @X @y ð2:19Þ we obtain from Eqs. 1 Classification of Second-Order Partial Differential Equations 17 This differential equation can be solved for dy/dx and one obtains the following two cases: pffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi.

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