Feasible domain of Walker's unsteady wall-layer model for the velocity profile in turbulent flows
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| Format: | Artículo científico |
| Langue: | en |
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Academia Brasileira de Ciências
2014
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| _version_ | 1876480293050777600 |
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| author | MIKHAIL D. MIKHAILOV |
| author_facet | MIKHAIL D. MIKHAILOV |
| contents | Feasible domain of Walker's unsteady wall-layer model for the velocity profile in turbulent flows MIKHAIL D. MIKHAILOV ATILA P. SILVA FREIRE Multidisciplinaria (Ciencias Naturales y Exactas) unsteady model Law of the wall feasible domain asymptotic theory turbulent boundary layer The present work studies, in detail, the unsteady wall-layer model of Walker et al. (1989, AIAA J., 27, 140 – 149) for the velocity profile in turbulent flows. Two new terms are included in the transcendental nonlinear system of equations that is used to determine the three main model parameters. The mathematical and physical feasible domains of the model are determined as a function of the non-dimensional pressure gradient parameter (p+). An explicit parameterization is presented for the average period between bursts (T + B), the origin of time (t +0 ) and the integration constant of the time dependent equation (A0) in terms of p+. In the present procedure, all working systems of differential equations are transformed, resulting in a very fast computational procedure that can be used to develop real-time flow simulators. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907049 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| format | Artículo científico |
| id | redalyc_32732907049 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Feasible domain of Walker's unsteady wall-layer model for the velocity profile in turbulent flows MIKHAIL D. MIKHAILOV Multidisciplinaria (Ciencias Naturales y Exactas) unsteady model Law of the wall feasible domain asymptotic theory turbulent boundary layer Feasible domain of Walker's unsteady wall-layer model for the velocity profile in turbulent flows MIKHAIL D. MIKHAILOV ATILA P. SILVA FREIRE Multidisciplinaria (Ciencias Naturales y Exactas) unsteady model Law of the wall feasible domain asymptotic theory turbulent boundary layer The present work studies, in detail, the unsteady wall-layer model of Walker et al. (1989, AIAA J., 27, 140 – 149) for the velocity profile in turbulent flows. Two new terms are included in the transcendental nonlinear system of equations that is used to determine the three main model parameters. The mathematical and physical feasible domains of the model are determined as a function of the non-dimensional pressure gradient parameter (p+). An explicit parameterization is presented for the average period between bursts (T + B), the origin of time (t +0 ) and the integration constant of the time dependent equation (A0) in terms of p+. In the present procedure, all working systems of differential equations are transformed, resulting in a very fast computational procedure that can be used to develop real-time flow simulators. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907049 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| title | Feasible domain of Walker's unsteady wall-layer model for the velocity profile in turbulent flows |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) unsteady model Law of the wall feasible domain asymptotic theory turbulent boundary layer |
| url | https://www.redalyc.org/articulo.oa?id=32732907049 |