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Abstract

In the paper, the authors discuss the construction of a model of an exemplary urban layout. Numerical simulation has been performed by means of a commercial software Fluent using two different turbulence models: the popular k-ε realizable one, and the Reynolds Stress Model (RSM), which is still being developed. The former is a 2-equations model, while the latter – is a RSM model – that consists of 7 equations. The studies have shown that, in this specific case, a more complex model of turbulence is not necessary. The results obtained with this model are not more accurate than the ones obtained using the RKE model. The model, scale 1:400, was tested in a wind tunnel. The pressure measurement near buildings, oil visualization and scour technique were undertaken and described accordingly. Measurements gave the quantitative and qualitative information describing the nature of the flow. Finally, the data were compared with the results of the experiments performed. The pressure coefficients resulting from the experiment were compared with the coefficients obtained from the numerical simulation. At the same time velocity maps and streamlines obtained from the calculations were combined with the results of the oil visualisation and scour technique.
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Abstract

The aim of the author is to present some messianic and prophetic ideas, which are intrinsically fused with Karl Marx’s doctrines, and which had also been expressed in Jewish mystical thought as well as in the ethical message of the Bible. Although Marx did not obtain any proper Jewish education, he was not able to reject his own being-a-Jew or his inborn spirituality together with the implicit axio-normative system of Judaism. Marxist philosophy, generally speaking, is dominated by the postulate of building a better and a more just world, and by the ethical demand of creating a new reality, from which poverty and social marginalization would be eradicated. However, such views were not new. For, it was the author of the Biblical “Book of Devarim”, who earlier emphasized the need for social solidarity. There had also been some Jewish prophets who criticized kings and priests, and Tsfat Jewish mystics who had formulated an ethically radical tikkun ha-olam postulate in the 16th century.
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