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Çѱ¹¼öÀÚ¿øÇÐȸ / v.27, no.2, 1994³â, pp.155-166
Eulerian-Lagrangian ¹æ¹ýÀ» ÀÌ¿ëÇÑ 1Â÷¿ø Á¾È®»ê¹æÁ¤½ÄÀÇ ¼öÄ¡¸ðÇü
( Numerical Modeling of One-Dimensional Longitudinal Dispersion Equation using Eulerian-Lagrangian Method )
¼­ÀÏ¿ø;±è´ë±Ù; ¼­¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;¼­¿ï´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;
 
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Eulerian-Lagrangian ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© 1Â÷¿ø Á¾È®»ê¹æÁ¤½ÄÀÇ ¼öÄ¡¸ðÇüÀ» ºñ±³¡¤ºÐ¼®ÇÏ¿´´Ù. º» ¿¬±¸¿¡¼­¼­ ºñ±³¡¤ºÐ¼®ÇÑ ¸ðÇüÀº Áö¹è¹æÁ¤½ÄÀ» ¿¬»êÀÚ ºÐ¸®¹æ¹ý¿¡ ÀÇÇØ¼­ À̼۸¸À» Áö¹èÇÏ´Â À̼۹æÁ¤½Ä°ú È®»ê¸¸À» Áö¹èÇÏ´Â È®»ê¹æÁ¤½ÄÀ¸·Î ºÐ¸®ÇÑ´Ù. À̼۹æÁ¤½ÄÀº Ư¼º°î¼±À» µû¶ó¼­ À¯Ã¼ÀÔÀÚ¸¦ ÃßÀûÇϴ Ư¼º°î¼±¹ýÀ» »ç¿ëÇÏ¿© ÇØ¸¦ ±¸Çϰí, ±× °á°ú¸¦ °íÁ¤µÈ Eulerian °ÝÀÚ»ó¿¡ º¸°£ÇÏ¿´°í, È®»ê¹æÁ¤½ÄÀº »ó±â °íÁ¤°ÝÀÚ»ó¿¡¼­ Crank-Nicholson À¯ÇÑÂ÷ºÐ¹ýÀ» »ç¿ëÇÏ¿© ÇØ¸¦ ±¸ÇÏ¿´´Ù. À̼۹æÁ¤½ÄÀÇ Ç®ÀÌ¿¡¼­ ´Ù¾çÇÑ º¸°£¹æ¹ýÀÌ Àû¿ëµÇ¾ú´Âµ¥, ÀϹÝÀûÀ¸·Î Hermite º¸°£´ÙÇ×½ÄÀ» »ç¿ëÇÑ °æ¿ì°¡ Lagrange º¸°£´ÙÇ×½ÄÀ» »ç¿ëÇÑ °æ¿ìº¸´Ù ¼öġȮ»ê ¹× ¼öÄ¡Áøµ¿ µîÀÇ ¿ÀÂ÷¸¦ ÃÖ¼ÒÈ­ÇÒ ¼ö À־ ´õ¿í ¿ì¼öÇÑ °ÍÀ¸·Î ¹àÇôÁ³´Ù.
Various Eulerian-Lagrangian numerical models for the one-dimensional longitudinal dispersion equation are studied comparatively. In the model studied, the transport equation is decoupled into two component parts by the operator-splitting approach ; one part governing adveciton and the other dispersion. The advection equation has been solved using the method of characteristics following fluid particles along the characteristic line and the results are interpolated onto an Eulerian grid on which the dispersion equation is solved by Crank-Nicholson type finite difference method. In solving the advection equation, various interpolation schemes are tested. Among those, Hermite interpolation polynomials are superior to Lagrange interpolation polynomials in reducing dissipation and dispersion errors in the simulation.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.27, no.2, 1994³â, pp.155-166
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199411920094974)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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