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Çѱ¹¼öÀÚ¿øÇÐȸ / v.44, no.10, 2011³â, pp.819-830
õ¼ö¹æÁ¤½Ä¿¡ ´ëÇÑ ´ÙÁß °æ»ç MUSCLÀÇ Àû¿ë
( An Application of the Multi-slope MUSCL to the Shallow Water Equations )
Ȳ½Â¿ë;ÀÌ»ïÈñ; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿ø.ȯ°æ¿¬±¸º»ºÎ ÇÏõ ÇØ¾ÈÇ׸¸¿¬±¸½Ç;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿ø.ȯ°æ¿¬±¸º»ºÎ ÇÏõ ÇØ¾ÈÇ׸¸¿¬±¸½Ç;
 
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T. Buffard and S. ClainÀº ÀÚ·áÀÇ ¼±Çü À籸Ãà¿¡¼­ °è»ê °ÝÀÚÀÇ °¢ º¯¿¡¼­ º¸Á¸º¯¼öÀÇ °æ»ç°¡ ¼³Á¤µÇ´Â ´ÙÁß °æ»ç MUSCLÀ» Á¦¾ÈÇÏ¿´´Ù. ÀÌ ¿¬±¸¿¡¼­´Â õ¼ö¹æÁ¤½Ä¿¡ ´ëÇÑ ¼öÄ¡¸ðÇüÀÇ °³¹ßÀ» À§ÇØ ºñ±¸Á¶ °ÝÀÚ¿¡¼­ °ø°£¿¡ ´ëÇÑ 2Â÷ Á¤È®µµ¸¦ ¾òÀ» ¼ö ÀÖ´Â ´ÙÁß °æ»ç MUSCLÀ» Àû¿ëÇÏ¿´À¸¸ç, È帧·üÀÇ °è»êÀ» À§ÇØ ±Ù»ç Riemann ÇØ¹ý Áß¿¡¼­ HLLL ±â¹ýÀ» ÀÌ¿ëÇÏ¿´´Ù. ¸ðÇüÀÇ Àû¿ë¼º °ËÅ並 À§ÇØ À¯·´ÀÇ IMPACT »ç¾÷ÀÇ ÀÏȯÀ¸·Î ½Ç½ÃµÈ '°í¸³µÈ °Ç¹° ½ÃÇè'°ú '¸ðÇü µµ½Ã È«¼ö ½ÇÇè'°ú ºñ±³ÇÏ¿´´Ù. °Ç¹°ÀÇ Àü¸é¿¡¼­ ÀúÇ׿¡ ÀÇÇÑ °©ÀÛ½º·± ¼ö½É »ó½Â°ú °Ç¹° »çÀÌ Æ¯Á¤ À§Ä¡¿¡¼­ ¼ö½ÉÀÇ ¿¹Ãø¿¡´Â ÇѰ谡 ÀÖ¾úÀ¸³ª, À̰ÍÀº °°Àº ½ÇÇè¿¡ ´ëÇÑ ¿©·¯ ¸ðÇüµéÀÇ Àû¿ë °á°ú¿¡¼­µµ ³ªÅ¸³ª´Â ¹®Á¦ÀÎ °ÍÀ¸·Î È®ÀεǾú´Ù. º¸´Ù ¼¼ºÐµÈ °è»ê °ÝÀÚ¿¡¼­ '¸ðÇü µµ½Ã È«¼ö ½ÇÇè'¿¡ ´ëÇÑ ¸ðÀÇ °á°ú°¡ ÃøÁ¤°ª¿¡ Àß ºÎÇյǴ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. °³¹ßµÈ ¸ðÇüÀ¸·Î ´ï ºØ±«³ª µ¹¹ß È«¼ö¿¡ ÀÇÇÑ µµ½Ã ħ¼ö¿Í °°Àº º¹ÀâÇÑ Çö»óÀ» Àß ¸ðÀÇÇÒ ¼ö ÀÖÀ½ÀÌ È®ÀεǾú´Ù.
The multi-slope MUSCL, proposed by T. Buffard and S. Clain, determines slopes of conserved variables at each edge of a cell in the linear reconstructions of data. In this study, the second order accurate numerical model was developed according to the multi-slope MUSCL to solve the shallow water equations on the unstructured grids. The HLLL scheme of approximate Riemann solvers was used to calculate fluxes. For the review of the applicability of the developed model, the results of the model were compared to the 'isolated building test' and the 'model city flooding experiment' conducted as part of the IMPACT (Investigation of extreMe flood Processes And unCerTainty) project in Europe. There were limitations to predict abrupt rising of water depths by the resistance of model buildings and water depths at the specific locations among the buildings. But they were identified as the same problems also revealed in results of the other models to the same experiment. On the more refined meshes to the 'model city flooding experiment' simulated results showed good agreement with measurements. It was verified that the developed model simulated well the complex phenomena such as a dam-break problem and the urban inundation by flash floods.
 
Ű¿öµå
õ¼ö¹æÁ¤½Ä;±Ù»ç Riemann ÇØ¹ý;´ÙÁß °æ»ç MUSCL;shallow water equations;approximate Riemann solver;Multi-slope MUSCL;MUSCL;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.44, no.10, 2011³â, pp.819-830
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201132833919597)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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