Análisis numérico de la convección natural en recintos cerrados con distinto factor de forma
<span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 0pt; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"><span style="font-size: small;"><span style="font-family:...
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| Format: | Article |
| Language: | English |
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Universidad Nacional de Ingeniería
2011-12-01
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| Series: | Nexo |
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| Online Access: | http://www.lamjol.info/index.php/NEXO/article/view/589/414 |
| Summary: | <span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 0pt; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"><span style="font-size: small;"><span style="font-family: Times New Roman;"><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">In this work, numerical analysis was used to determine temperature distribution, density and both vertical as horizontal velocities applying engineering simulation software ANSYS. This was conduct for a closed cavity with geometrical relations height/width (</span><em><span lang="EN-US" style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT; mso-ansi-language: EN-US;">H/E</span></em></span><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">) of 0.5, 1 and 2. Likewise, constant temperatures in the left-right vertical walls of 50 and 20 °C and adiabatic boundary condition for the horizontal walls were considered. This activity was done considering Prandtl and Rayleigh numbers of 4.83 and 5.84x10</span></span><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; font-size: 6.5pt; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">7</span><span style="font-size: small;"><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">, respectively. When results were compared for </span><em><span lang="EN-US" style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT; mso-ansi-language: EN-US;">H/E </span></em><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">= 2 and </span><em><span lang="EN-US" style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT; mso-ansi-language: EN-US;">H/E </span></em><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">= 1, it was found that the positive maximum value for the vertical velocity increased 26.29 %, horizontal velocity decreased 72.75 % and the central zone temperature in the cavity decreased 2.46 %. On the other hand, when the results for </span><em><span lang="EN-US" style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT; mso-ansi-language: EN-US;">H/E </span></em><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">= 0.5 and </span><em><span lang="EN-US" style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT; mso-ansi-language: EN-US;">H/E </span></em><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;">= 1 were compared, it was found that the positive maximum value for the vertical velocity increased 7.24 %, horizontal velocity increased 34.08 % and the central zone temperature in the system decreased 3.70 %.</span></span></p><span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 0pt; text-align: justify; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;"><span style="font-size: small;"> </span></span></p><span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 0pt; text-align: justify; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"><span lang="EN-US" style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT; mso-ansi-language: EN-US;"><span style="font-size: small;">Keywords: Natural convection; Closed cavity; ANSYS</span></span></p><span style="font-family: Times New Roman; font-size: small;"> </span><br><span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 0pt; text-align: justify; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"><span style="font-size: small;"><span style="font-family: Times New Roman;"><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;">En este trabajo se utilizó el análisis numérico, aplicando el programa de simulación para ingeniería ANSYS, para establecer la distribución de temperaturas, densidad y velocidades vertical y horizontal en una cavidad cerrada con relación geométrica alto/ancho (</span><em><span style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;">H/E</span></em></span><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;">) del sistema de 0.5, 1 y 2, temperatura constante en la pared vertical izquierda y derecha de 50 y 20 °C, respectivamente, y condición de frontera adiabática en las paredes horizontales. Lo anterior para un número de Prandtl de 4.83 y Rayleigh de 5.84x10</span></span><span style="font-family: "TimesNewRomanPSMT","sans-serif"; font-size: 6.5pt; mso-bidi-font-family: TimesNewRomanPSMT;">7</span><span style="font-size: small;"><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;">. Al comparar los resultados entre el sistema con </span><em><span style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;">H/E </span></em><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;">= 2 y </span><em><span style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;">H/E </span></em><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;">= 1, se encontró que el valor máximo positivo de la velocidad vertical se incrementó un 26.29 %, el de la velocidad horizontal disminuyó 72.75 % y la temperatura en la zona central de la cavidad disminuyó un 2.46 %. Por otro lado, al comparar los resultados del sistema </span><em><span style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;">H/E </span></em><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;">= 0.5 y </span><em><span style="font-family: "TimesNewRomanPS-ItalicMT","serif"; mso-bidi-font-family: TimesNewRomanPS-ItalicMT;">H/E </span></em><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;">= 1, se encontró que el valor máximo positivo de la velocidad vertical aumentó un 7.24 %, el de la velocidad horizontal se incrementó 34.08 % y la temperatura de la zona central del sistema disminuyó un 3.70 %.</span></span></p><p style="margin: 0cm 0cm 0pt; text-align: justify; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"><span style="font-size: small;"><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;"> </span></span><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;"><span style="font-family: Times New Roman; font-size: small;"> </span></span></p><p style="margin: 0cm 0cm 0pt; text-align: justify; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"><span style="font-family: "TimesNewRomanPSMT","sans-serif"; mso-bidi-font-family: TimesNewRomanPSMT;"><span style="font-size: small;">Palabras claves: Convección natural; Cavidad cerrada; ANSYS</span></span></p><p style="margin: 0cm 0cm 0pt; text-align: justify; line-height: normal; mso-layout-grid-align: none;" class="MsoNormal"> </p> |
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| ISSN: | 1818-6742 1995-9516 |