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Numerical simulation of flow over horizontal strip moving in stratified water
Bodnár, Tomáš ; Beneš, L.
The contribution deals with the numerical simulation of the flow over thin horizontal strip placed in the stably stratified fluid flow. Mathematical model is based on the Boussinesq approximation of tne N-S equations. Two different numerical schemes were used for numerical solution. The first one is high order compact finite difference scheme, the secon one is the finite volume AUSM MUSCL scheme.
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Aggregations as an antipredator strategy in common toad tadpoles (\kur{Bufo bufo}).
BODNÁR, Tomáš
Tadpoles of many anuran species use a huge number of behavioral modifications to avoid predators. Reduced activity in presence of predators is favorite strategy for common toad tadpoles (Bufo bufo). Responses against predator cues by tadpoles of Bufo bufo in the presence of another cue of larger tadpole aggregation were tested in this study. We observed that these tadpoles responded differently to predator chemical cues than tadpoles in a small group.
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O validaci numerického modelu pro simulaci turbulentního proudění s volnou hladinou
Bodnár, T. ; Kozel, K. ; Příhoda, Jaromír
The numerical solution of averaged Navier-Stokes equations with the two-equation SST turbulence model is carried out by means of the VOF method. This approach is based on the assumptions for variable-density incompressible flow with discontinuity in density profile at the free-surface. Numerical solution by means of the finite-volume method utilises the cell-centered scheme on a structured mesh. Numerical results were compared with experimental data for subcritical flow over ribs in an open channel.
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