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Çѱ¹¼öÀÚ¿øÇÐȸ / v.44, no.2, 2011³â, pp.109-123
È¥ÇÕ°ÝÀÚÀÇ Àû¿ëÀÌ °¡´ÉÇÑ 2Â÷¿ø À¯ÇÑüÀû¸ðÇüÀÇ °³¹ß
( Development of Two-dimensional Finite Volume Model Applicable to Mixed Meshes )
±èº´Çö;ÇѰǿ¬;¼Õ¾Æ·Õ; ͏®Æ÷´Ï¾Æ ÁÖ¸³´ëÇб³ ¾ó¹ÙÀÎ, Åä¸ñ.ȯ°æ°øÇаú;°æºÏ´ëÇб³ °ø°ú´ëÇÐ °ÇÃà.Åä¸ñ°øÇкÎ;°æºÏ´ëÇб³ °ø°ú´ëÇÐ °ÇÃà.Åä¸ñ°øÇкÎ;
 
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º» ¿¬±¸¿¡¼­´Â ÀÚ¿¬ÇÏõ°ú °°Àº º¹ÀâÇÑ ÁöÇüÀÇ Ã³¸®¿¡ È¿À²ÀûÀÎ »ï°¢Çü ¹× »ç°¢Çü È¥ÇÕ°ÝÀÚÀÇ Àû¿ëÀÌ °¡´ÉÇÑ 2Â÷¿ø À¯ÇÑüÀû¸ðÇüÀ» °³¹ßÇÏ¿´´Ù. À̸¦ À§ÇØ °è»ê°ÝÀÚÀÇ ÀÎÁ¢°ÝÀÚ¸¦ ã´Â ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇϰí, Á¦¾È ±â¹ýÀ» °³¹ß¸ðÇü¿¡ Àû¿ëÇÏ¿© °è»ê°ÝÀÚ ¹× ÀÎÁ¢°ÝÀÚÀÇ °æ°è¸é¿¡¼­ÀÇ È帧·üÀ» HLLC ±Ù»ç Riemann ÇØ¹ýÀ» ÀÌ¿ëÇÏ¿© °è»êÇÏ¿´´Ù. ¶ÇÇÑ È帧·ü°ú »ý¼ºÇ×»çÀÌÀÇ ±ÕÇü¿¡ Áß¿äÇÑ ¿µÇâÀ» Áִ ȥÇÕ°ÝÀÚÀÇ ÇÏ»ó°æ»ç 󸮸¦ À§ÇØ »ï°¢Çü ¹× »ç°¢Çü °ÝÀÚ¿¡ ´ëÇØ °¢°¢ ´Ù¸¥ ÇÏ»ó°æ»ç °è»ê½ÄÀ» Àû¿ëÇÏ¿´´Ù. °³¹ß¸ðÇüÀ» È¥ÇÕ°ÝÀÚ·Î ±¸¼ºµÈ $90^{circ}$ ¸¸°îÀÌ Á¸ÀçÇÏ´Â ½ÇÇèÇϵµ¿¡ ´ëÇÑ ´ï ºØ±« ÇØ¼® ¹× ÀÚ¿¬ÇÏõÀÎ Malpasset ´ï ºØ±« ÇØ¼®¿¡ Àû¿ëÇϰí, °è»ê°á°ú¸¦ ½ÇÇèÀÚ·á ¹× ÇöÀåÁ¶»çÀÚ·á¿Í ºñ±³ÇÔÀ¸·Î½á º» ¿¬±¸¿¡¼­ Á¦¾ÈÇÑ ±â¹ýÀ» ½ÇÇèÇϵµ ¹× ÀÚ¿¬ÇÏõ¿¡ ´ëÇØ °ËÁõÇÏ¿´´Ù.
In this study, 2D finite volume model, which can apply to the mixed meshes that is effective to treat the complicated topography such as a natural river, is developed. To do so, an algorithm for finding the neighbouring cell of a computational cell is introduced, and fluxes are computed using the HLLC approximate Riemann solver at each interface between a computational cell and it's neighbouring cells. Moreover, in order to numerically treat the bed slope which has important effect on the balance between flux gradients and sourte terms, different formula to compute the bed slope for rectangular and triangular mesh are applied. The developed model is applied to analyze dam-break in an experimental channel with $90^{circ}$ bend and Malpasset dam-break in France. The two cases consist of mixed meshes and the suggested method is validated for the experimental channel and natural channel by comparison with the experimental data, field data and computed results.
 
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È¥ÇÕ°ÝÀÚ;º¹ÀâÇÑ ÁöÇü;HLLC Riemann ÇØ¹ý;ÇÏ»ó°æ»ç;À¯ÇÑüÀû¸ðÇü;mixed mesh;complex geometry;HLLC Riemann solver;bed slope;finite volume model;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.44, no.2, 2011³â, pp.109-123
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201108863881017)
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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