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Çѱ¹¼öÀÚ¿øÇÐȸ / v.36, no.1, 2003³â, pp.1-11
ENO ±â¹ýÀ» ÀÌ¿ëÇÑ 2Â÷¿ø À¯ÇÑüÀû ¼öÄ¡¸ðÇü
( A Finite Volume Model Using ENO Scheme for 2D Unsteady flows )
°­¹Î±¸;¹Ú½Â¿ì; ¼­¿ï´ëÇб³ ³ó°øÇаú;¼­¿ï´ëÇб³ ³ó°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â 2Â÷¿ø ºÎÁ¤·ù ÇØ¼®À» À§ÇÑ À¯ÇÑüÀû ¼öÄ¡¸ðÇüÀ» °³¹ßÇÏ¿´´Ù. °³¹ßµÈ ¸ðÇü¿¡¼­´Â õ¼ö¹æÁ¤½ÄÀÇ ¼öÄ¡ÇØ¸¦ ±¸Çϱâ À§ÇÏ¿© Lax-Friedrichs ÇØ¹ý¿¡ ±Ù°£À» µÐ ENO (essentially non-oscillatory) ±â¹ýÀ» Àû¿ëÇÏ¿´À¸¸ç, °ø°£ÀûÀ¸·Î 2Â÷ Á¤µµ ¸ðÀǸ¦ À§ÇÏ¿© ¼öÁ¤ MUSCL ±â¹ýÀ» Àû¿ëÇÏ¿´´Ù. °³¹ßµÈ ¸ðÇüÀÇ Àû¿ë¼ºÀ» Æò°¡Çϱâ À§ÇÏ¿© ÇØ¼®Çذ¡ ÀÖ´Â 1Â÷¿ø ´ï ºØ±«ÆÄ ¸ðÀÇ¿¡ Àû¿ëÇÑ °á°ú, ÇØ¼®ÇØ¿Í À¯»çÇÑ °á°ú¸¦ ³ªÅ¸³ÂÀ¸¸ç, ¼öÁ¤ MUSCL ±â¹ýÀÇ ¸ðÀǰá°ú¸¦ minmod °æ»çÁ¦ÇÑÀÚ¸¦ »ç¿ëÇÑ ¸ðÀǰá°ú¿Í ºñ±³ÇÑ °á°ú, ¼öÁ¤ MUSCL ±â¹ýÀ» »ç¿ëÇÏ´Â °æ¿ì ÇØ¼®ÇØ¿Í ´õ ±ÙÁ¢ÇÑ °á°ú¸¦ ³ªÅ¸³Â´Ù. ´ïºØ±«ÆÄÀÇ 2Â÷¿ø ÇØ¼®¿¡ ´ëÇÑ ¸ðÇüÀÇ Àû¿ë¼ºÀ» Æò°¡Çϱâ À§ÇÏ¿© ´ëĪÇü, ºñ´ëĪÇü ´ï ºØ±«¿¡ Àû¿ëÇÑ °á°ú, Àú¼öÁö¿¡¼­ ¼ö·Î ±¸°£À¸·Î Ãæ°ÝÆÄ ÀüÆÄ¸¦ Àß ¸ðÀÇÇßÀ¸¸ç, ±âÁ¸ÀÇ ¿¬±¸°á°ú¿Í À¯»çÇÑ ¸ðÀǰá°ú¸¦ ³ªÅ¸³Â´Ù. °³¼ö·ÎÀÇ ºÎÁ¤·ù ÇØ¼®¿¡ ´ëÇÑ ¸ðÇüÀÇ Àû¿ë¼ºÀ» Æò°¡Çϱâ À§ÇÏ¿© ¸»´ÜÀÌ Æó¼âµÈ ¼ö·ÎÀÇ ÀÔ±¸¿¡¼­ Á¤»óÆÄ°¡ ÁÖ¾îÁ³À» ¶§ ¼öÀ§¿Í À¯¼ÓÀ» ¸ðÀÇÇÏ¿© ÇØ¼®ÇØ¿Í ºñ±³ÇÏ¿´À¸¸ç, ÀÔ±¸¿Í ¸»´ÜÀÌ Æó¼âµÈ ¼ö·Î¿¡¼­ ÆÄÀÇ Áøµ¿À» ¸ðÀÇÇÏ¿© ¸ðÇüÀÇ °Åµ¿À» Æò°¡ÇÏ¿´´Ù.
This paper describes a finite volume, two-dimensional model. It adopts a recently developed essentially non-oscillatory(ENO) schemes based on the Lax-Friedrichs solver, which was modified for a finite volume grid, and employs a modified MUSCL(Monotonic Upstream centered Scheme for Conservation Law) for second-order accuracy in space. To demonstrate the applications of the model, it is applied to solve the 1-D and 2-D dam-break problems. The model in conjunction with the modified MUSCL showed a better agreement with analytical solutions than the minmod function in 1-D dam-break problems and is satisfactorily validated with documented published data in 2-D dam-break problems. The model was applied to tidal wane entering channel at one end, and the results showed a good agreement with analytical solutions. In the channel with reflective boundary conditions specified at the extremities, the model was capable of accurately simulating the wave propagation.£¿
 
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.36, no.1, 2003³â, pp.1-11
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311921555592)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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