@article{14466,
  abstract     = {The first long-lived turbulent structures observable in planar shear flows take the form of localized stripes, inclined with respect to the mean flow direction. The dynamics of these stripes is central to transition, and recent studies proposed an analogy to directed percolation where the stripes’ proliferation is ultimately responsible for the turbulence becoming sustained. In the present study we focus on the internal stripe dynamics as well as on the eventual stripe expansion, and we compare the underlying mechanisms in pressure- and shear-driven planar flows, respectively, plane-Poiseuille and plane-Couette flow. Despite the similarities of the overall laminar–turbulence patterns, the stripe proliferation processes in the two cases are fundamentally different. Starting from the growth and sustenance of individual stripes, we find that in plane-Couette flow new streaks are created stochastically throughout the stripe whereas in plane-Poiseuille flow streak creation is deterministic and occurs locally at the downstream tip. Because of the up/downstream symmetry, Couette stripes, in contrast to Poiseuille stripes, have two weak and two strong laminar turbulent interfaces. These differences in symmetry as well as in internal growth give rise to two fundamentally different stripe splitting mechanisms. In plane-Poiseuille flow splitting is connected to the elongational growth of the original stripe, and it results from a break-off/shedding of the stripe's tail. In plane-Couette flow splitting follows from a broadening of the original stripe and a division along the stripe into two slimmer stripes.},
  author       = {Marensi, Elena and Yalniz, Gökhan and Hof, Björn},
  issn         = {1469-7645},
  journal      = {Journal of Fluid Mechanics},
  keywords     = {turbulence, transition to turbulence, patterns},
  publisher    = {Cambridge University Press},
  title        = {{Dynamics and proliferation of turbulent stripes in plane-Poiseuille and plane-Couette flows}},
  doi          = {10.1017/jfm.2023.780},
  volume       = {974},
  year         = {2023},
}

@misc{5553,
  abstract     = {Genotypic, phenotypic and demographic data for 2128 wild snapdragons and 1127 open-pollinated progeny from a natural hybrid zone, collected as part of Tom Ellis' PhD thesis (submitted) February 2016).

Tissue samples were sent to LGC Genomics in Berlin for DNA extraction, and genotyping at 70 SNP markers by KASPR genotyping. 29 of these SNPs failed to amplify reliably, and have been removed from this dataset.

Other data were retreived from an online database of this population at www.antspec.org.},
  author       = {Field, David and Ellis, Thomas},
  keywords     = {paternity assignment, pedigree, matting patterns, assortative mating, Antirrhinum majus, frequency-dependent selection, plant-pollinator interaction},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Inference of mating patterns among wild snapdragons in a natural hybrid zone in 2012}},
  doi          = {10.15479/AT:ISTA:37},
  year         = {2016},
}