Turbulent convection by thermoelectricity in a cooling-heating didactive device
Local Diffusion and the topological structure of vorticity and velocity fields is measured in the transition from a homogeneous linearly stratified fluid to a cellular or layered structure by means of convective cooling and/or heating. Patterns arise by setting up a convective flow generated by an a...
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| Format: | Article |
| Language: | English |
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Ivannikov Institute for System Programming of the Russian Academy of Sciences
2018-10-01
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| Series: | Труды Института системного программирования РАН |
| Subjects: | |
| Online Access: | https://ispranproceedings.elpub.ru/jour/article/view/258 |
| _version_ | 1818055969040498688 |
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| author | J. M. Redondo J. D. Tellez J. M. Sanchez |
| author_facet | J. M. Redondo J. D. Tellez J. M. Sanchez |
| author_sort | J. M. Redondo |
| collection | DOAJ |
| description | Local Diffusion and the topological structure of vorticity and velocity fields is measured in the transition from a homogeneous linearly stratified fluid to a cellular or layered structure by means of convective cooling and/or heating. Patterns arise by setting up a convective flow generated by an array of Thermoelectric devices (Peltier/Seebeck cells) these are controlled generating a buoyant heat flux. The experiments described here investigate high Prandtl number mixing using brine and fresh water in order to form density interfaces and low Prandtl number mixing with temperature gradients. The set of dimensionless parameters define conditions of numeric and small scale laboratory modeling of environmental flows. Fields of velocity, density and their gradients were computed and visualized using the open software tools of DigiFlow. When convective heating and cooling takes place in the side wall of a stratified enclosed cell, the combination of internal waves and buoyancy driven turbulence is much more complicated if the Rayleigh and Reynolds numbers are high. Higher order moments calculations and intermittency are important in order to study mixing in complex flows Here some examples are shown using the Thermoelectric Convection Didactive Device (TCDD) built by BEROTZA, mainly in a symmetric two dimensional pattern, but many other combinations, using heating-cooling and angles with the vertical are possible in order to validate more complex numerical experiments. |
| first_indexed | 2024-12-10T12:21:23Z |
| format | Article |
| id | doaj.art-4b06110e54674ed79bd66b0ef5754306 |
| institution | Directory Open Access Journal |
| issn | 2079-8156 2220-6426 |
| language | English |
| last_indexed | 2024-12-10T12:21:23Z |
| publishDate | 2018-10-01 |
| publisher | Ivannikov Institute for System Programming of the Russian Academy of Sciences |
| record_format | Article |
| series | Труды Института системного программирования РАН |
| spelling | doaj.art-4b06110e54674ed79bd66b0ef57543062022-12-22T01:49:03ZengIvannikov Institute for System Programming of the Russian Academy of SciencesТруды Института системного программирования РАН2079-81562220-64262018-10-0129221523010.15514/ISPRAS-2017-29(2)-8258Turbulent convection by thermoelectricity in a cooling-heating didactive deviceJ. M. Redondo0J. D. Tellez1J. M. Sanchez2Dept. Física, UPC BarcelonaTech; BEROTZA S.L., Noain, PamplonaDept. Física, UPC BarcelonaTech; Dept. of Civil and Environmental Engineering (Institute Flumen); BEROTZA S.L., Noain, PamplonaBEROTZA S.L., Noain, PamplonaLocal Diffusion and the topological structure of vorticity and velocity fields is measured in the transition from a homogeneous linearly stratified fluid to a cellular or layered structure by means of convective cooling and/or heating. Patterns arise by setting up a convective flow generated by an array of Thermoelectric devices (Peltier/Seebeck cells) these are controlled generating a buoyant heat flux. The experiments described here investigate high Prandtl number mixing using brine and fresh water in order to form density interfaces and low Prandtl number mixing with temperature gradients. The set of dimensionless parameters define conditions of numeric and small scale laboratory modeling of environmental flows. Fields of velocity, density and their gradients were computed and visualized using the open software tools of DigiFlow. When convective heating and cooling takes place in the side wall of a stratified enclosed cell, the combination of internal waves and buoyancy driven turbulence is much more complicated if the Rayleigh and Reynolds numbers are high. Higher order moments calculations and intermittency are important in order to study mixing in complex flows Here some examples are shown using the Thermoelectric Convection Didactive Device (TCDD) built by BEROTZA, mainly in a symmetric two dimensional pattern, but many other combinations, using heating-cooling and angles with the vertical are possible in order to validate more complex numerical experiments.https://ispranproceedings.elpub.ru/jour/article/view/258конвекциятермоэлектричествоэлементы пелетьеэксперименты, k-e модель турбулентноститурбулетностьпрограмма digiflow |
| spellingShingle | J. M. Redondo J. D. Tellez J. M. Sanchez Turbulent convection by thermoelectricity in a cooling-heating didactive device Труды Института системного программирования РАН конвекция термоэлектричество элементы пелетье эксперименты, k-e модель турбулентности турбулетность программа digiflow |
| title | Turbulent convection by thermoelectricity in a cooling-heating didactive device |
| title_full | Turbulent convection by thermoelectricity in a cooling-heating didactive device |
| title_fullStr | Turbulent convection by thermoelectricity in a cooling-heating didactive device |
| title_full_unstemmed | Turbulent convection by thermoelectricity in a cooling-heating didactive device |
| title_short | Turbulent convection by thermoelectricity in a cooling-heating didactive device |
| title_sort | turbulent convection by thermoelectricity in a cooling heating didactive device |
| topic | конвекция термоэлектричество элементы пелетье эксперименты, k-e модель турбулентности турбулетность программа digiflow |
| url | https://ispranproceedings.elpub.ru/jour/article/view/258 |
| work_keys_str_mv | AT jmredondo turbulentconvectionbythermoelectricityinacoolingheatingdidactivedevice AT jdtellez turbulentconvectionbythermoelectricityinacoolingheatingdidactivedevice AT jmsanchez turbulentconvectionbythermoelectricityinacoolingheatingdidactivedevice |