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Çѱ¹¼öÀÚ¿øÇÐȸ / v.36, no.4, 2003³â, pp.597-608
TVD±â¹ýÀ» ÀÌ¿ëÇÑ ºÒ¿¬¼Ó È帧ÀÇ ¼öÄ¡ÇØ¼®
( A Numerical Analysis of a Discontinuous Flow with TVD Scheme )
ÀüÁ¤¼÷;À̺ÀÈñ;Á¶¿ë½Ä; »ï¾È°Ç¼³±â¼ú°ø»ç ¼öÀÚ¿øºÎ;ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â õ¼ö¹æÁ¤½ÄÀ» ÀÌ¿ëÇÏ¿© 2Â÷¿ø °³¼ö·Î¿¡¼­ ÇÏ»ó°ú ÇÏÆøÀÌ ±Þ°ÝÈ÷ º¯È­ÇÏ´Â °æ¿ì¿¡ ¹ß»ýÇϴ õÀÌ·ù¸¦ ÇØ¼®ÇÏ¿´´Ù. ºÒ¿¬¼ÓÁ¡ ±Ùó¿¡¼­ ¹ß»ýÇÏ´Â ¼öÄ¡Áøµ¿À» Á¦¾îÇϸ鼭 ½Ã°£°ú °ø°£¿¡ ´ëÇÑ 2Â÷ Á¤È®µµ¸¦ È®º¸Çϱâ À§ÇÏ¿© WAF ±â¹ý¿¡ TVD Á¶°ÇÀ» °®´Â È帧·ü Á¦ÇÑÀÚ¸¦ µµÀÔÇÏ¿´À¸¸ç, RiemannÇØ¸¦ °è»êÇϱâ À§ÇÏ¿© 3°³ÀÇ ÀüÆÄ¼Óµµ¸¦ °í·ÁÇÏ´Â HLLC ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿´´Ù. °³¼ö·Î¿¡¼­ ´Ü¸éº¯È­¸¦ °í·ÁÇÑ 2Â÷¿ø ÇØ¼®À» ÇÒ °æ¿ì, °ÝÀÚ ±¸¼º°ú °æ°è 󸮿¡¼­ ¾î·Á¿òÀÌ ¹ß»ýÇÑ´Ù. ÀÌ¿Í °°Àº ¾î·Á¿òÀ» ÇØ°áÇϱâ À§ÇÏ¿© ÀϹÝÁÂÇ¥°è¸¦ µµÀÔÇÏ¿© ÇÏÆøÀÌ º¯È­ÇÏ´Â ±¸°£¿¡ ¹ß»ýÇϴ õÀÌ·ù¸¦ ¼öÄ¡¸ðÀÇÇÏ¿´´Ù.
A transcritical flow occurs when the width and slope of a channel are varying abruptly. In this study, the transcritical flow in a two-dimensional open channel is analyzed by using the shallow-water equations. A weighted average flux scheme that has flux limiter with a total variation diminishing condition is introduced for a second-order accuracy in time and space, and non- spurious oscillations at discontinuous points. A HLLC method with three wane speeds is employed to calculate the Riemann problem. To overcome difficulties resulting from variation of channel sections in a two-dimensional analysis of transcritical flow, the numerical model is developed based on a generalized grid system.
 
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õ¼ö¹æÁ¤½Ä;TVD ±â¹ý;HLLC ¹æ¹ý;õÀÌ·ù;ÁÂÇ¥º¯È¯;shallow-water equations;TVD scheme;HLLC method;transcritical flow;grid generation;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.36, no.4, 2003³â, pp.597-608
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311921879110)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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