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Çѱ¹¼öÀÚ¿øÇÐȸ / v.38, no.2, 2005³â, pp.155-166
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»ó·ùÀ̼۱â¹ý¿¡¼ÀÇ »õ·Î¿î »ý¼ºÇ× Ã³¸® ±â¹ý
( New Treatment of Source Terms in Upwind Schemes ) |
| ±è¿ø;ÇѰǿ¬;¿ìÈ¿¼·;ÃÖ±ÔÇö; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿ø¿¬±¸ºÎ;°æºÏ´ëÇб³ Åä¸ñ°øÇаú;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿ø¿¬±¸ºÎ;°æºÏ´ëÇб³ Åä¸ñ°øÇаú;
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| »ó·ùÀ̼۱â¹ýÀº ºÒ¿¬¼Ó È帧À» ÇØ¼®ÇÒ ¼ö Àֱ⠶§¹®¿¡ ´ïºØ±«·ù, õÀÌ·ù µîÀÇ ÇØ¼®¿¡ ¸¹ÀÌ ÀÌ¿ëµÇ°í ÀÖ´Ù. ±×·¯³ª »ó·ùÀ̼۱â¹ýÀº »ý¼ºÇ× Ã³¸®°úÁ¤¿¡¼ ¹ß»ýÇÏ´Â ¿ÀÂ÷·Î ÀÎÇØ ºÒ±ÕÀÏÇÑ ´Ü¸éÀ» °¡Áø ÀÚ¿¬ÇÏõ¿¡´Â °ÅÀÇ Àû¿ëµÇÁö ¸øÇÏ°í ´Ü¼øÈµÈ Çϵµ¿¡¸¸ ÁÖ·Î Àû¿ëµÇ¾î ¿Ô´Ù. º» ³í¹®¿¡¼´Â »ý¼ºÇ×ÀÇ Â÷ºÐȸ¦ À§Çؼ Á¤±ÔÈµÈ JacobianÀ» »ç¿ëÇÏ´Â »ó·ùÀ̼ÛÇü »ý¼ºÇ× Ã³¸®±â¹ýÀ» °³¹ßÇÏ¿´´Ù. Àû¿ë °á°ú º» ¿¬±¸¿¡¼ Á¦¾ÈµÈ »ý¼ºÇ× Ã³¸®±â¹ýÀÌ Á¤È®ÇÏ¸é¼ È¿À²ÀûÀÎ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. º» ¿¬±¸¿¡¼ Á¦¾ÈÇÑ ¹æ¹ýÀº ´Ü¼øÇÑ ÇüŸ¦ Áö´Ï°í ÀÖÀ¸¸ç ´Ù¸¥ »ó·ùÀ̼۱â¹ý¿¡µµ ´Ù¾çÇÏ°Ô Àû¿ëµÉ ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. |
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| Upwind schemes are very well adapted to the discontinuous flow and have become popular for applications Involving dam break flow, transcritical Slow, etc. However, upwind schemes have been applied mainly to the idealized problems not to the natural channels with irregular geometry so far because of the error due to source terms. In this paper, the new type of upwind discretization of source terms, which uses the normalized Jacobian to discretize the source terms, is proposed. As results of tests to flows with source terms by the upwind models, the method proposed in this paper is proved as efficient and accurate. This generalized method for differencing source terms is simple and might beapplicable to diverse type of flux upwind discretization scheme in finite difference method. |
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| Ű¿öµå |
| »ó·ùÀ̼Û;»ý¼ºÇ×;ºÒ¿¬¼Ó È帧;µµ¼ö;upwind scheme;source term;discontinuous flow;hydraulic jump; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.38, no.2, 2005³â, pp.155-166
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200514714215286)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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