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Çѱ¹¼öÀÚ¿øÇÐȸ / v.36, no.5, 2003³â, pp.777-785
WAF ±â¹ýÀ» ÀÌ¿ëÇÑ Ãµ¼ö¹æÁ¤½Ä ÇØ¼®
( Weighted Averaged Flux Method for Computation of Shallow Water Equations )
±è¿ì±¸;Á¤°ü¼ö;±èÀçÇÑ; Çѱ¹¼öÀÚ¿ø°ø»ç ¼öÀÚ¿ø¿¬±¸¿ø;Ãæ³²´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;Ãæ³²´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â ºñ±¸Á¶°ÝÀÚ ÁÂÇ¥°è»ó¿¡¼­ õ¼ö¹æÁ¤½Ä ÇØ¼®À» À§ÇÑ ¼öÄ¡¸ðÇüÀ» °³¹ßÇÏ¿´´Ù. Fractional step method¸¦ ÀÌ¿ëÇÏ¿© ÀÌÂ÷¿øÀÇ Ãµ¼ö¹æÁ¤½ÄÀ» µÎ°³ÀÇ ÀÏÂ÷¿ø ¹®Á¦·Î ºÐ¸®ÇÏ¿© °è»ê È¿À²ÀÌ ¿ì¼öÇÑ ¼öÄ¡¿¬»êÀ» ¼öÇàÇÏ¿´´Ù. ºÐ¸®µÈ ÀÏÂ÷¿ø ¹®Á¦´Â ÀÌÂ÷Á¤È®µµÀÇ TVD ±â¹ýÀ» ÀÌ¿ëÇÏ¿© ÇØ¼®ÇÏ¿´´Ù. TVD ±â¹ýÀº HLLC ±â¹ýÀ» ÀÌ¿ëÇÏ¿© Riemann ÇØ¸¦ ±¸ÇÑÈÄ WAF ±â¹ýÀ» ±â¹ÝÀ¸·Î ÀÌ¿ëÇÏ¿´À¸¸ç WAF È帧À² Á¦ÇÑÀÚ¸¦ ÀÌ¿ëÇÏ¿© ÀÌÂ÷Á¤È®µµ ¹®Á¦¿¡ ¼ö¹ÝµÇ´Â ºñ¹°¸®ÀûÀÎ ¼öÄ¡Áøµ¿À» Á¦¾îÇÏ¿´´Ù. °³¹ßµÈ ¸ðÇüÀ» ´Ù¾çÇÑ ¹®Á¦¿¡ Àû¿ëÇÑ °á°ú, ÇØ¼®ÇØ¿Í °è»êµÈ °á°ú°¡ ¸Å¿ì Àß ÀÏÄ¡ÇÏ¿´À¸¸ç, º» ¸ðÇüÀÌ ºÒ¿¬¼ÓÇØ³ª »ó·ù»ç·ùÀÇ È¥ÇÕÈ帧 ¹× À̵¿°æ°è ¹®Á¦ µî¿¡ ÀÌ¿ëµÉ ¼ö ÀÖÀ½À» º¸¿´´Ù.
A numerical model for the solution of two-dimensional free surface flow is developed on unstructured grid. By using fractional step method, the two-dimensional shallow water equations (SWE) are treated as two one-dimensional problems. Thus, it is possible to simulate computational hydraulic problems with higher computational efficiency. The one-dimensional problems are solved using upwind TVD version of second-order Weighted Averaged Flux (WAF) scheme with HLLC approximate Riemann solver. The numerical oscillations which are common with second-order numerical scheme are controlled by exploiting WAF flux limiter, Some idealized test problems are solved using this model and very accurate and stable solutions are obtained. It can be concluded as an efficient implement for the computation of SWE including dam break problems that concerning discontinuities, subcritical and supercritical flows and complex domain.
 
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WAF ±â¹ý;HLLC Riemann ÇØ;TVD ±â¹ý;õ¼ö¹æÁ¤½Ä;À̵¿°æ°è±â¹ý;WAF method;HLLC Riemann solver;TVD scheme;Shallow water equations;Wet and Dry technique;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.36, no.5, 2003³â, pp.777-785
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311922024532)
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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