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Çѱ¹¼öÀÚ¿øÇÐȸ / v.43, no.1, 2010³â, pp.105-117
ºñÁ¤Çü°ÝÀÚÀÇ Àû¿ëÀ» À§ÇÑ MUSCL ±â¹ýÀÇ ¼öÁ¤
( Modification of MUSCL Scheme for Application of Non-uniform Grid )
±èº´Çö;ÇѰǿ¬; °æºÏ´ëÇб³ °ø°ú´ëÇÐ °ÇÃà.Åä¸ñ°øÇкΠBK21»ç¾÷´Ü;°æºÏ´ëÇб³ °ø°ú´ëÇÐ °ÇÃà.Åä¸ñ°øÇкÎ;
 
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º» ³í¹®Àº 2Â÷¿ø õ¼ö¹æÁ¤½ÄÀ» ÇØ¼®Çϱâ À§ÇØ »õ·Ó°í °£´ÜÇÑ MUSCL À籸¼º¹ýÀ» Á¦¾ÈÇÏ¿´´Ù. ¼öÁ¤ MUSCL ±â¹ýÀº º¸Á¸º¯¼öÀÇ À籸¼ºÀ» À§ÇØ °è»ê°ÝÀÚ¿Í ÀÎÁ¢°ÝÀÚÀÇ º¸Á¸º¯¼ö Â÷¿¡ ´ëÇØ °¢ °æ°è¸é¿¡ ±ÕÀÏÇÏ°Ô ºÐ¹èÇÏ´Â ±âÁ¸ ¹æ¹ý ´ë½Å ¸éÀû°¡Áߺñ¸¦ »ç¿ëÇÏ¿´À¸¸ç, ÀÌ ¹æ¹ýÀº Á¤Çü°ÝÀÚ »Ó¸¸ ¾Æ´Ï¶ó ºñÁ¤Çü °ÝÀÚÀÇ »ç¿ë¿¡µµ º¸Á¸º¯¼öÀÇ ¹°¸®Àû À籸¼ºÀÌ °¡´ÉÇÏ´Ù. ¶ÇÇÑ, º» ¿¬±¸¿¡¼­´Â ºñ±¸Á¶Àû °ÝÀÚÀÇ Àû¿ëÀÌ °¡´ÉÇÑ Â÷¿øºñºÐ¸® ±â¹ýÀ» Àû¿ëÇÏ¿´À¸¸ç, ¼öÁ¤ MUSCL ±â¹ýÀÇ »ç¿ëÀ¸·Î ¹ß»ýÇÒ ¼ö ÀÖ´Â ¼öÄ¡Áøµ¿À» Á¦¾îÇϱâ À§ÇØ TVD ±â¹ýÀÇ °æ»çÁ¦ÇÑÀÚ¸¦ »ç¿ëÇÏ¿´´Ù. ÇÏ»ó°æ»çÇ×ÀÇ Á¤È®Çϰí È¿À²ÀûÀÎ ¼öÄ¡ 󸮸¦ À§ÇØ ¼öÁ¤ MUSCL ±â¹ýÀ» ¼ö¸é°æ»ç¹ý°ú ¿¬°èÇÏ¿´´Ù. Á¦¾ÈÇÑ ±â¹ýÀ» Àû¿ëÇÑ À¯ÇÑüÀû¸ðÇüÀ» °Ç¹°ÀÇ ¿µÇâÀ» °í·ÁÇÑ ´ï ºØ±« ÇØ¼® ¹× BellosÀÇ ´ï ºØ±« ½ÇÇè¿¡ Àû¿ëÇϰí, Àû¿ë°á°ú¸¦ ½ÇÇè½Ç ÀÚ·á ¹× ±âÁ¸ ¿¬±¸ÀÚÀÇ °è»ê°á°ú¿Í ºñ±³ÇÏ¿© °³¹ß¸ðÇüÀ» °ËÁõÇÏ¿´´Ù.
This paper presents a new and simple technique to perform MUSCL reconstruction for solving 2D shallow water equations. The modified MUSCL scheme uses weighted area ratio to apply non-uniform grid in stead of the previous method that equally distributed the difference of conservation variables to each interface. The suggested method can physically reconstruct conservation variables in case of uniform grid as well as non-uniform grid. In this study, Unsplit scheme applicable to unstructured grid is used and efficient slope limiter of TVD scheme is used to control numerical oscillation which can be occurred in modified MUSCL scheme. For accurate and efficient treatment of bed slope term, the modified MUSCL scheme is coupled with the surface gradient method. The finite volume model applied to suggested scheme is verified through a comparison between numerical solution and laboratory measurements data such as the simulations of isolated building test case and Bellos's dam break test case.
 
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¼öÁ¤ MUSCL ±â¹ý;ºñÁ¤Çü °ÝÀÚ;°¡Á߸éÀûºñ;°ÝÀÚÀ籸¼º;°íÂ÷Á¤È®µµ;modified MUSCL scheme;non-uniform grid;weighted area ratio;grid reconstruction;high-order accuracy;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.43, no.1, 2010³â, pp.105-117
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201005364710402)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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ȸ»ç¼Ò°³ ±¤°í¾È³» ÀÌ¿ë¾à°ü °³ÀÎÁ¤º¸Ãë±Þ¹æÄ§ Ã¥ÀÓÀÇ ÇѰè¿Í ¹ýÀû°íÁö À̸ÞÀÏÁÖ¼Ò ¹«´Ü¼öÁý °ÅºÎ °í°´¼¾ÅÍ
   

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