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Random field sampling for a simplified model of melt-blowing considering turbulent velocity fluctuations | | Florian Hübsch
; Nicole Marheineke
; Klaus Ritter
; Raimund Wegener
; | | Date: |
30 Aug 2012 | | Abstract: | In melt-blowing very thin liquid fiber jets are spun due to high-velocity air
streams. In literature there is a clear, unsolved discrepancy between the
measured and computed jet attenuation. In this paper we will verify numerically
that the turbulent velocity fluctuations causing a random aerodynamic drag on
the fiber jets -- that has been neglected so far -- are the crucial effect to
close this gap. For this purpose, we model the velocity fluctuations as vector
Gaussian random fields on top of a k-epsilon turbulence description and develop
an efficient sampling procedure. Taking advantage of the special covariance
structure the effort of the sampling is linear in the discretization and makes
the realization possible. | | Source: | arXiv, 1208.6175 | | Services: | Forum | Review | PDF | Favorites | |
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