A well-known problem in the statistical mechanics of fluids ( gases, liquids, plasmas ) is how to treat particles that are similar or identical in nature : should they be regarded as distinguishable or not?
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At the University of Paris in July 1985 his thesis entitled : " Homogenization of the Equations of the Mechanics of Fluids ", granted him the degree of " Docteur d'Etat is Sciences Math�matiques ".
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A common misconception is that Coand effect is demonstrated when a stream of tap water flows over the back of a spoon held lightly in the stream and the spoon is pulled into the stream ( for example, Massey in " Mechanics of Fluids " uses the Coand effect to explain the deflection of water around a cylinder ).