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Çѱ¹¼öÀÚ¿øÇÐȸ / v.34, no.2, 2001³â, pp.177-186
TVD ¼öÄ¡¸ðÇüÀÇ °³¹ß: I. ¼±Çü À̼۹æÁ¤½Ä
( Development of TVD Numerical Models: I. Linear Advection Equation )
ÀÌÁ¾¿í;Á¶¿ë½Ä;À±±¤¼®;À¯ÅÂÈÆ; ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø;ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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2Â÷ ÀÌ»óÀÇ Á¤È®µµ¸¦ °¡Áö¸ç ºÒ¿¬¼Ó¸é¿¡¼­ ¼öÄ¡Áøµ¿ÀÌ ¹ß»ýÇÏÁö ¾Ê´Â ¼öÄ¡¸ðÇüÀÇ °³¹ßÀ» À§ÇØ Ç³»óÂ÷ºÐ±â¹ý¿¡ ±âÃÊÇÑ TVD±â¹ýÀÌ ¼Ò°³µÇ¾ú´Ù. ÀÌ ¼öÄ¡¸ðÇüÀ» ºÒ¿¬¼Ó¸é ÀÌ Á¸ÀçÇÏ´Â °æ¿ì¿Í Á¸ÀçÇÏÁö ¾Ê´Â °æ¿ì¿¡ ´ëÇØ Àû¿ëÇÏ¿´À¸¸ç, ÀÌ °á°ú 1Â÷ Á¤È®µµÀÇ Ç³»óÂ÷ºÐ±â¹ýÀº ½Ã°£ÀÌ Áö³ª¸é¼­ ¼öÄ¡Á¡¼ºÀÇ ¿µÇâÀÌ Ä¿Á³À¸¸ç 2Â÷ Á¤È®µµÀÇ Lax-Wendroff±â¹ýÀÇ °æ¿ì¿¡´Â ºÒ¿¬¼Ó¸é¿¡¼­ Áøµ¿ÀÌ ¹ß»ýÇÏ¿´´Ù. ±×·¯³ª TVD±â¹ýÀº ¸ðµç °æ¿ì¿¡¼­ ¸¸Á·½º·¯¿î °á°ú¸¦ ¿¹ÃøÇÏ¿´´Ù.
By using he total variation diminishing (TVD) condition, accurate and upwind based schemes are firstly introduced to develop numerical models free from nonphysical oscillations in the vicinity of large gradients. These models are then applied to both abruptly and smoothly varying initial conditions. By comparing computed predictions to analytical solutions, it is clearly shown that the first-order upwind scheme produces the numerical viscosity and the second-order Lax-Wendroff scheme produces the spurious oscillations. However, the TVD scheme gives the most reasonable results.
 
Ű¿öµå
TVD scheme;advection equation;numerical oscillation;upwind scheme;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.34, no.2, 2001³â, pp.177-186
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920731860)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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