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Çѱ¹¼öÀÚ¿øÇÐȸ / v.29, no.1, 1996³â, pp.203-212
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( A Comparative Study on Spatial and Temporal Line Interpolation of Characteristic Method )
¹éÁßö;¹è´öÈ¿; ¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ »ê¾÷±â¼ú¿¬±¸¼Ò ¼±ÀÓ¿¬±¸¿ø, ¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú Á¶±³¼ö, ¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;
 
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Ư¼º°î¼±ÀÌ Åë°úÇÏ´Â ÀÎÁ¢ ½Ã°£ÁØÀ§¿¡¼­ÀÇ 3°³ °ÝÀÚÁ¡À» ÀÌ¿ëÇÑ ½Ã°£ÁØÀ§ Lagrange º¸°£±â¹ýÀ» °³¹ßÇÏ¿©, ±âÁ¸ÀÇ ½Ã°£ÁØÀ§ º¸°£±â¹ýÀÎ Reachback ±â¹ý°ú µÎ°¡Áö °ø°£ º¸°£±â¹ý, Áï Upwind ±â¹ý°ú 3°³ÀÇ °ø°£ °ÝÀÚÁ¡À» ÀÌ¿ëÇÑ °ø°£ 2Â÷ º¸°£±â¹ý°ú ÇÔ²² µÎ°¡Áö ÇüÅÂÀÇ ¿À¿°¿ø À̼۹®Á¦¿¡ °¢°¢ Àû¿ë ÇÏ¹Ç·Î½á °ø°£ ¹× ½Ã°£ÁØÀ§ º¸°£±â¹ý¿¡ ÀÇÇÑ ¼öÄ¡ÇØÀÇ Á¤È®µµ¸¦ ºñ±³, ºÐ¼®ÇÏ¿´´Ù. º» ¿¬±¸°á°ú¿¡ ÀÇÇÏ¸é µ¿ÀÏÇÑ Â÷¼öÀÇ º¸°£±â¹ýÀ» ºñ±³ÇÒ °æ¿ì, °ø°£º¸°£ ±â¹ýº¸´Ù ½Ã°£ º¸°£±â¹ýÀ» ÀÌ¿ëÇÏ¸é ¼öÄ¡ºÐ»ê ¶Ç´Â ¼öÄ¡Áøµ¿ÀÌ ÀûÀº º¸´Ù Á¤È®ÇÑ ¼öÄ¡ÇØ¸¦ ±¸ÇÒ ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÇÑÆí, º» ¿¬±¸¿¡¼­ Á¦½ÃÇÑ ±â¹ýÀº ±âÁ¸ ½Ã°£ÁØÀ§ º¸°£±â¹ý¿¡ ÀÇÇÑ ÇØÀÇ ÀåÁ¡À» Æ÷ÇÔÇϸ鼭 Á¤È®µµ¸¦ Çâ»ó½Ãų ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
The subject research attempts to develop a new temporal interpolation scheme for the method of characteristics. The proposed three-point time-line Lagrange interpolation Reachback (3PR) method is a temporal quadratic interpolation scheme using the three grid points near the intersection between a characteristic line and a previous time-line. The accuracy of the 3PR method is compared with those of temporal and spatial interpolation schemes such as Reachback, Upwind, and quandratic spatial interpolation methods for two pure advection problems. The results show that on the aspects of the numerical damping and/or oscillation the temporal interpolation schemes are better than the spatial ones under the same interpolation order conditions. In addition, the spatial ones under the same interpolation order conditions. In addition, the proposed 3PR method improves the accuracy of Reachback method as well as it contains the merits of time-line interpolation schemes.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.29, no.1, 1996³â, pp.203-212
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920096771)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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