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Çѱ¹¼öÀÚ¿øÇÐȸ / v.29, no.2, 1996³â, pp.199-207
$kappa-imath$ ³­·ù¸ðµ¨À» ÀÌ¿ëÇÑ ¿Â¹è¼ö ¼öÄ¡ÇØ¼®
( A Numerical Analysis of Thermal Discharge using $kappa-imath$ Turbulence Closure )
ÃÖÈï½Ä; »óÁö´ëÇб³ À̰ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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¿Â¹è¼öÀÇ °Åµ¿Çؼ®¿¡ $kappa-imath$ ³­·ù¸ðµ¨ÀÇ »ç¿ë¼º Æò°¡¸¦ À§ÇØ ¼ö½ÉÀûºÐ 2Â÷¿ø ¼öÄ¡¸ðÇüÀ» °³¹ßÇÏ¿´´Ù. °³¹ßµÈ ¸ðÇüÀº °£´ÜÇÑ ´Ü¸éÀ» °®´Â °³¼ö·Î Á¤»ó·ùÀÇ °æ¿ì¿¡ Àû¿ëÇÏ¿´À¸¸ç, ±âÁ¸ÀÇ ½ÇÇè°á°ú¿Í ºñ±³Àû Àß ÀÏÄ¡ÇÏ¿´´Ù. ¿Â¼öÀÇ Àç¼øÈ¯, ÀçºÎÂø ¹× Ãʰú¿Âµµ »ó½ÂºÐÆ÷ÀÇ ÀûÀýÇÑ ¸ðÀÇÇØ¼®Àº $kappa-imath$ ³­·ù¸ðµ¨¿¡ ÀÇÇÑ ÀûÀýÇÑ ³­·ù Á¡¼º ¹× È®»ê°è¼öÀÇ »êÁ¤¶§¹®À̶ó »ý°¢µÈ´Ù. ¿¹ÃøÀÇ Á¤È®¼ºÀ» À§ÇÏ¿© ºÎ·Â»ý¼ºÇ×ÀÇ µµÀÔ, Source/Sink Ç×ÀÇ ¼öÁ¤ ¹× ±×¿¡ µû¸¥ ÀûÀýÇÑ ³­·ù »ó¼öÀÇ ±Ô¸íÀÌ ÇÊ¿äÇÏ´Ù.
To evaluate the usage of $kappa-imath$ turbulence closure for the analysis of thermal discharge behavior, a two-dimensional depth-integrated numerical model is developed. The developed model is applied to a steady flow in an open channel with simle geometry and the numerical results agree well with existing experimental data. The adequate simulation of recirculation, reattachment, and excess temperature rise at downstream of the outlet in the channel attributes to the correct calculation of turbulent eddy viscosity and diffusivity by $kappa-imath$ turbulence model. For an accurate prediction of thermal discharge behavior, the introduction of buoyancy production term, the modification of source/sink, and the correct input of turbulence constants of the $kappa-imath$ turbulence model are required.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.29, no.2, 1996³â, pp.199-207
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920097048)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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