Francisco J. Higuera

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The equations describing the rst two terms of an asymptotic expansion of the solution of the planar turbulent mixing layer for values of the velocity ratio close to one are obtained. The rst term of this expansion is the solution of the well-known time-evolving problem and the second, which includes the eects of the increase of the turbulence scales in the(More)
The-assumed-pdf approximation of (Cook & Riley 1994) is tested as a subgrid model for the LES computation of nonpremixed turbulent reacting ows, in the limit of cold innnitely fast chemistry, for two plane turbulent mixing layers with diierent degrees of intermittency. Excellent results are obtained for the computation of integrals properties such as(More)
The Kroemer model for the Gunn effect in a circular geometry (Corbino disks) has been numerically solved. The results have been interpreted by means of asymptotic calculations. Above a certain onset dc voltage bias, axisymmetric pulses of the electric field are periodically shed by an inner circular cathode. These pulses decay as they move towards the outer(More)
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