Mass transfer from Phycomyces in the avoidance and anemotropic responses: Numerical modeling
| Autor: | R.I. Gamow, R.L. Sani, J.J. Pellegrino |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Statistics and Probability
Mass flux Materials science General Immunology and Microbiology Meteorology Applied Mathematics Flux Reynolds number Humidity General Medicine Mechanics Avoidance response General Biochemistry Genetics and Molecular Biology symbols.namesake Modeling and Simulation Mass transfer symbols General Agricultural and Biological Sciences Saturation (chemistry) Transpiration |
| Zdroj: | Journal of Theoretical Biology. 105:77-90 |
| ISSN: | 0022-5193 |
| DOI: | 10.1016/0022-5193(83)90425-3 |
| Popis: | The giant, single-celled sporangiophore of Phycomyces bends into a prevailing wind (the anemotropic response) and bends away from a solid barrier (the avoidance response). We have modeled the sporangiophores' growth zone (GZ) as an infinite cylinder and numerically solved the appropriate (two-dimensional, steady-state) transport equations for the mass flux from the GZ using H2O as the transpiring species. For the anemotropic response, we have found that (1) as expected, the flux is greater from the windward side than the leeward side; (2) the flux asymmetry increases with increasing Reynolds number (Re); (3) the flux asymmetry decreases with increasing ambient humidity and this decrease is more pronounced at higher Re. For the avoidance response, we have found that (1) as expected, the flux is greater from the distal side; (2) the flux asymmetry increases as the barrier is moved closer to the cylinder; and (3) the flux asymmetry is independent of ambient humidity until 100% saturation is reached. If the transpiration rate of water mediates these responses, these results predict that (1) the anemotropic response should decrease as a function of increasing the humidity of the wind and (2) the avoidance response will be independent of humidity except at 100% humidity. |
| Databáze: | OpenAIRE |
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