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Çѱ¹¼öÀÚ¿øÇÐȸ / v.21, no.3, 1998³â, pp.291-291
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¿øÁÖÁÖÀ§¸¦ Áö³ª´Â È帧¿¡ °üÇÑ ¼öÄ¡ÇØ¼®
( - Numerical Solutions for the Flow past a Cylinder- ) |
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| 2Â÷¿ø È帧ÀÌ ¿øÁÖÁÖÀ§¸¦ Áö³¯ ¶§ ¹ß»ýÇÏ´Â È帧ÀÇ º¯È°¡ ±âº»¹æÁ¤½ÄÀÎ ¿¬¼Ó¹æÁ¤½Ä°ú ¿îµ¿·®¹æÁ¤½Ä¿¡ ÀÇÇÏ¿© ¼öÄ¡ÀûÀ¸·Î ÇØ¼®µÈ´Ù. ¼öÃ¤ÇØ¼® °úÁ¤Àº ±âº»¹æÁ¤½Ä¿¡ À¯ÇÔ¼ö, ¿Íµµ ¹× È帧ÀÇ Æ¯¼ºÀ» ³ªÅ¸³»´Â ¹«Â÷¿ø ¸Å°³º¯¼ö¸¦ µµÀÔÇÏ¿© ¹«Â÷¿ø À¯ÇÔ¼ö-¿Í¼Ò¼ö¼Û½ÄÀ» À¯µµÇÑÈÄ, successive over relaxation scheme°ú alternating direct implicit schemeÀ¸·Î ¼öÇàµÈ´Ù. ¼öÄ¡½ÇÇèÀº ·¹À̳îÁî¼ö 125-275¸¦ °®´Â È帧¿¡ ´ëÇÏ¿© ¼öÇàµÇ¾úÀ¸¸ç, ½Ã°£¿¡ µû¸¥ À¯¼±, ¿Íµµ, ¿øÁÖÇ¥¸éÀÇ ¾Ð·ÂÀ» ±¸ÇÏ´Â ¹æ¹ý¿¡ ÀÖ¾î¼ ±âÁ¸ÀÇ ¼öÄ¡ÇØ¼®¿¡¼´Â ÁÖ·Î ¹æ»ç ¿îµ¿·®¹æÁ¤½Ä¸¸À» »ç¿ëÇÏ¿´À¸³ª, º» ³í¹®¿¡¼´Â ±âÁ¸ÀÇ ¹æ¹ý¿Ü¿¡ ¹æ»ç ¿îµ¿·®¹æÁ¤½Ä ¹× Á¢¼± ¿îµ¿·®¹æÁ¤½Ä¿¡ ÀÇÇØ ¾Ð·ÂÀ» °èÇÑÇϰí, µÎ°ªÀ» ºñ±³ÇÏ¿© ·¹À̳îÁî¼ö¿¡ µû¸¥ ¾Ð·ÂÀ» ±¸ÇÏ´Â ¹æ¹ýÀ» Á¦½ÃÇÑ´Ù. ¶ÇÇÑ ¿ÍµµÀÇ ºÐÆ÷¸¦ µµ½ÃÇÏ¿© ¿øÁÖ¿¡ ÀÇÇÑ ÈÄ·ùÀÇ ¿µÇâÀ» ¹ÞÁö ¾Ê´Â ¿ÜºÎ°æ°èÀÇÇѰ踦 »õ·ÎÀÌ ¼³Á¤ÇÑ´Ù. |
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| The two dimensional time dependent flow past a circular cylinder is analyzed numerically. In the analysis, equations of conservation of mass and momentum are transformed to equations of stream function-vorticity and vorticity transport, and nondimensionalized by nondimensional parameters representing flow characteristics, The resulting stream function-vorticity equation and vorticity transport equation are solved by successive over relaxation scheme and alternating direct implicit scheme. Numerical experiments are performed for the flow in the range of Reynolds number 125 to 275. The time dependent streamlines, vorticities, pressure on cylinder surface, separation angle, and drag and lift coefficients are calculated, and the method for estimation of pressure on cylinder surface and the outer boundary limit are developed. |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.21, no.3, 1998³â, pp.291-291
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199810102421208)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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