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Water condensation and two-phase flow modeling for a plate heat exchanger channel

There are water vapour condensation and two-phase flow in plate heat exchangers when they are used as condensers. Water phase change and flow dynamics modelling is an important but complicated task due to large change in water physical/transport properties across the water liquid-vapour interface boundary. In particular, singular-link behaviour in governing equations is present due to the large st

The "New Negro" in the Old World: Culture and Performance in James Weldon Johnson, Jessie Fauset, and Nella Larsen

Popular Abstract in Swedish I denna avhandling studeras europaskildringarna i James Weldon Johnsons The Autobiography of an Ex-Colored Man (1912), Jessie Fausets There Is Confusion (1924) och Nella Larsens Quicksand (1928) och hur dessa speglar afrikansk-amerikanernas roll i den västerländska civilisationen. I 1800-talets afrikansk-amerikanska litteratur figurerar Europa ofta som symbol för frihetThis thesis investigates the relationship between the “New Negro” moment of the early twentieth-century America and the Old World of Europe, as represented in James Weldon Johnson’s The Autobiography of an Ex-Colored Man (1912), Jessie Fauset’s There is Confusion (1924), and Nella Larsen’s Quicksand (1928). In the nineteenth century, Europe functioned as a symbol of freedom, education and art in t

Optimal design of compact heat exchangers by an artificial neural network method

The artificial neural network (ANN) methods are introduced (mainly for calculation of thermal and hydraulic coefficients) into a computer-aided design code of compact heat exchangers (CCHE). CCHE integrates the optimization, database, and process drawing into a software package. In the code, a strategy is developed for the optimization of compact heat exchangers (CHEs), which is a problem with cha

Charged Polymers at Spherical Surfaces

Two separate topics in the area of colloidal chemistry have been investigated by the use of molecular modeling: the structural properties of polyion?macroion complexes and of diblock polyampholyte brushes. The main results were obtained by the use of Monte Carlo simulation in the framework of the primitive model, and in the case of polyampholyte brushes the simulation results were also complemente