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Çѱ¹¼öÀÚ¿øÇÐȸ / v.29, no.2, 1996³â, pp.221-233
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³·ù¸ðÇüÀ» ÀÌ¿ëÇÑ øúöµÚËÓøÝÄ×µÀÇ ¼öÄ¡ÇØ¼®
( A Numerical Analysis of Buyoyant Surface Jet with Turbulence Models ) |
| ÃÖÇѱâ;Á߽ʰè; Á¤È¸¿ø, ºÎ»êÀü¹®´ëÇÐ Åä¸ñ°ú;´ë¹Ý´ëÇÐ °øÇкΠµµ¸ñ°øÇаú;
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| 2Â÷¿ø Ç¥Ãþ¹ÐµµºÐ·ùÀÇ Æ¯¼ºÀ» µ¿¿ªÇÐÀûÀ¸·Î ±¸¸íÇϱâ À§ÇØ ¼öÄ¡ÇØ¼®À» ÇÒ °æ¿ì°í·ÁÇØ¾ß ÇÒ °¡Àå Áß¿äÇÑ ¹®Á¦´Â ¼ºÃþ»óÅ¿¡¼ ³·ù¼ö¼ÛÀÇ Æò°¡¿Í ÀÚÀ¯¼öÇ¥¸éÀÇ Ã³¸®ÀÌ´Ù. º» ¿¬±¸¿¡¼´Â 2Â÷¿ø Ç¥Ãþ¹ÐµµºÐ·ù¿¡ ´ëÇÑ ³»ºÎÈ帧ÀÇ ¿¬Á÷¹æÇⱸÁ¶¸¦ µ¿¿ªÇÐÀûÀ¸·Î ±¸¸íÇϱâ À§Çؼ ºñÁ¤¼ö¾Ð ±Ù»ç ¹× ´ë¼öÀÀ·Â¸ðÇü(ASM) À» »ç¿ëÇÏ¿© SIMPLE·Î ¾Ë·ÁÁø ¼öÄ¡¸ðÇüÀ» Àû¿ëÇÏ¿´´Ù. $kappa-varepsilon$¸ðÇüÀÇ °áÁ¡ÀÎ ³·ùÀÇ À̹漺À» °í·ÁÇÑ ´ë¼öÀÀ·Â ¸ðÇü(ASM)À» »ç¿ëÇÑ 2Â÷¿ø Ç¥Ãþ¹ÐµµºÐ·ù ¼öÄ¡¸ðÇüÀº ¹Ðµµ°èÃþ¿¡ Æ÷ȹ°¨¼è ¹× ÀÚÀ¯¼ö¸é¿¡¼ ³·ù±¸Á¶¸¦ º¸´Ù Á¤È®ÇÏ°Ô ±Ô¸íÇÒ ¼ö ÀÖ¾ú´Ù. ´ë¼öÀÀ·Â¸ðÇü(ASM)¿¡ ÀÇÇÑ À¯µ¿ÀåÀÇ °è»ê°á°ú´Â $kappa-varepsilon$ ¸ðÇü¿¡ ÀÇÇÑ °á°ú¿Í ºñ±³ÇÏ¿© »ó´çÈ÷ °³¼±µÇ¿´À¸¸ç, ¼ö¸®½ÇÇè °á°ú¿Í Àß ÀÏÄ¡ÇÏ¿© ¸ðÇüÀÇ Àû¿ë¼ºÀÌ °ËÁõµÇ¾ú´Ù. |
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| To investigate the hydrodynamic characteristics of a two-dimensional buoyant surface jet, the most important factors of the numerical analysis are the evaluation of the free surface and the turbulence transportation under the stratification. In present study, a numeriacal simulation model used with the semi-implicit method for pressure-linked equations (SIMPLE), the non-hydrostatic approximation and the algebraic stress model (ASM) is applied to investigate the vertical structure of internal flow hydrodynamically. The ASM enables to take account of anisotropy of turbulence, the damping effects of the density interface, and the free surface on the turbulence structure accurately. The ASM tested produces better agreement than the $kappa-varepsilon$ model with measurements by Nakatsuji (1984) on the flow development and turbulence structure. Applicability of the ASM to a two-dimensional buoyant surface jet is examined through comparison with experimental data. |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.29, no.2, 1996³â, pp.221-233
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920097067)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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