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													| Çѱ¹¼öÀÚ¿øÇÐȸ / v.31, no.5, 1998³â, pp.599-612   |  
													| ÃÖÀû½ÃÇàÇÔ¼ö Petrov-Galerkin ¹æ¹ý ( Optimal Test Function Petrov-Galerkin Method )
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													| ¼ö¼Û¹æÁ¤½ÄÀÇ ¾ç¸éÀûÀº Ư¼ºÀ¸·Î ÀÎÇÏ¿© À̼ÛÇ×ÀÌ Áö¹èÀûÀÎ È帧¿¡ ÀÖ¾î¼ ¼ö¼Û¹æÁ¤½ÄÀÇ ¼öÃ¤ÇØ¼®Àº ¸Å¿ì ³ÇØÇÏ´Ù. ƯÈ÷ À¯ÇÑ¿ä¼Ò¹ýÀ» »ç¿ëÇÏ¿© ¼öÄ¡ÇØ¼®ÇÒ ¶§, »ó·ù¹æÇâÀ¸·Î ´õ ¸¹Àº °¡ÁßÄ¡¸¦ µÎ±â À§ÇÏ¿© º¯ÈµÈ ½ÃÇàÇÔ¼ö¸¦ »ç¿ëÇÑ´Ù. ÀÌ·¯ÇÑ ¹æ¹ýÀ» Petrov-Galerkin ¹æ¹ýÀ̶ó°í ÇÑ´Ù. º» ³í¹®¿¡¼´Â N+1 °ú N+2 Petrov-Galerkin ¹æ¹ýÀ» °ÝÀÚ Peclet ¼ö°¡ Å« ¼ö¼Û¹®Á¦¿¡ Àû¿ëÇÏ¿´´Ù. Á֯ļö¸ÂÃã ±â¹ýÀ» »ç¿ëÇÏ¿© N+2 Petrov- Galerkin ¹æ¹ýÀ» °ÝÀÚ Peclet ¼ö°¡ Å« ¼Ò¼Û¹®Á¦¿¡ Àû¿ëÇÏ¿´´Ù. Á֯ļö¸ÂÃã ±â¹ýÀ» »ç¿ëÇÏ¿© N+2 Petrov-Galerkin ¹æ¹ýÀÇ ÀûÁ¤ dz»óÁ¤µµ¸¦ ã¾Æ³»¾ú°í, ±× °á°ú¸¦ ÅäÀÇÇÏ¿´´Ù. ÀÌ ±â¹ýÀÇ ½ÃÇàÇÔ¼ö´Â À̼ÛÇ×°ú È®»êÇ×ÀÇ »ó´ëÀû Å©±â¿¡ µû¶ó ±× ¸ð¾çÀÌ º¯ÈµÈ´Ù. ¼öÄ¡½ÇÇèÀ» ÅëÇÏ¿© Á¦½ÃµÈ »õ·Î¿î ¼öÄ¡ÇØ¼®±â¹ýÀÇ ¿ì¼ö¼ºÀ» ¼³¸íÇÏ¿´´Ù. |  
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													| Numerical analysis of convection-dominated transport problems are challenging because of dual characteristics of the governing equation. In the finite element method, a strategy is to modify the test function to weight more in the upwind direction. This is called as the Petrov-Galerkin method. In this paper, both N+1 and N+2 Petrov-Galerkin methods are applied to transport problems at high grid Peclet number. Frequency fitting algorithm is used to obtain optimal levels of N+2 upwinding, and the results are discussed. Also, a new Petrov-Galerkin method, named as "Optimal Test Function Petrov-Galerkin Method," is proposed in this paper. The test function of this numerical method changes its shape depending upon relative strength of the convection to the diffusion. A numerical experiment is carried out to demonstrate the performance of the proposed method. |  
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													| ¼ö¼Û¹æÁ¤½Ä;À̼ÛÈ®»ê¹æÁ¤½Ä;Petrov-Galerkin À¯ÇÑ¿ä¼Ò¹ý;ÃÖÀû½ÃÇàÇÔ¼ö Petrov-Galerkin ¹æ¹ý;Á֯ļö¸ÂÃã ±â¹ý;transport equation;convection-diffusion equation;Petrov-Galerkin finite element method;optimal test function Petrov-Galerkin method;frequency fitting method; |  
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													| Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.31, no.5, 1998³â, pp.599-612 Çѱ¹¼öÀÚ¿øÇÐȸ
 ISSN : 1226-6280
 UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811920101263)
 ¾ð¾î : ¿µ¾î
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													| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |  
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