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Çѱ¹¼öÀÚ¿øÇÐȸ / v.28, no.4, 1995³â, pp.125-136
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À¯ÇÑÂ÷ºÐ ¸ðÇü¿¡ ÀÇÇÑ ÀÏÂ÷¿ø À̼Û-È®»ê¹æÁ¤½Ä °è»ê°á°úÀÇ ºñ±³
( Comparison of the Results of Finite Difference Method in One-Dimensional Advection-Dispersion Equation ) |
| ÀÌÈñ¿µ;ÀÌÀçö; ½Ã¸³´ëÇб³ Åä¸ñ°øÇаú;Çѱ¹ÅäÁö°³¹ß°ø»ç ÅäÁö¿¬±¸¿ø ±â¼ú°³¹ß½Ç, ¼¿ï½Ã¸³´ëÇб³ °»ç, ¼¿ï½Ã¸³´ëÇб³ Åä¸ñ°øÇаú;
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| ƯÁ¤°î¼±À» °í·ÁÇÑ ELMÀ» À̼Û-È®»ê¹æÁ¤½Ä¿¡ Àû¿ëÇÏ¿© ±× °á°ú¸¦ Eulerian ±â¹ý(Stone-Brian, QUICKEST)°ú ºñ±³ÇÏ¿´´Ù. À̼ÛÇ×ÀÇ °è»êÀ» À§Çؼ´Â Lagrangian º¸°£¹ý°ú Cubic spline º¸°£¹ýÀ» ÀÌ¿ëÇÏ¿´°í È®»êÇ×ÀÇ °è»ê¿¡ À־ Crank-Nicholson ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿´´Ù. ¼öÄ¡¸ðÇüÀÇ Àû¿ë°á°ú´Â ´ÙÀ½°ú °°´Ù. (1) Gaussian hill¿¡ÀÇ Àû¿ë:Lagrangian º¸°£¹ýÀ» »ç¿ëÇÏ¿© °è»êÇÑ °æ¿ì°¡ °¡Àå Á¤È®ÇÑ °á°ú¸¦ º¸¿´´Ù. Cubic spline º¸°£¹ýÀ» »ç¿ëÇÑ °æ¿ì¿Í QUICKEST ¹æ¹ýÀÇ °æ¿ì¿¡´Â Peclet¼ö°¡ 50ÀÎ °æ¿ì¿¡ °¨¼èÇö»óÀ» º¸¿´´Ù. Stone-Brian¹æ¹ýÀº Peclet¼ö 10,50¿¡¼ À§»ó¿ÀÂ÷°¡ ¹ß»ýÇÏ¿´´Ù. (2) Advanced front¿¡ÀÇ Àû¿ë: ¸ðµç ¹æ¹ýÀÌ Peclet¼ö 1,4¿¡¼ Á¤È®ÇÑ °á°ú¸¦ ¾ò¾ú´Ù. Peclet¼ö°¡ 50ÀÎ °æ¿ì¿¡ Lagrangian º¸°£¹ýÀ» »ç¿ëÇÏ¿© °è»êÇÑ °æ¿ì¿Í Stone-Brian ¹æ¹ýÀº ÁõÆø¿ÀÂ÷°¡ ¹ß»ýÇÏ¿´°í Cubic spline º¸°£¹ýÀ» »ç¿ëÇÑ °æ¿ì¿Í QUICKEST ¹æ¹ýÀÇ °æ¿ì´Â ¼öÄ¡Áøµ¿ Çö»óÀ» º¸¿´´Ù. |
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| ELM, a characteristic line based method, was applied to advection-dispersion equation, and the results obtained were compared with those of Eulerian schemes(Stone-Brian and QUICKEST). The calculation methods consisted of Lagrangian interpolation scheme and cubic spline interpolation scheme for the advection calculation, and the Crank-Nicholson scheme for the dispersion calculation. The results of numerical methods were as follows: (1) for Gaussian hill: ELM, using Lagrangian interpolation scheme, gave the most accurate computational result, ELM, using cubic spline interpolation scheme, and QUICKEST scheme gave numerical damping for Peclet number 50. Stone-Brian scheme gave phase shift introduced in the numerical solution for Peclet number 10 and 50. (2) for advanced front: All schemes gave accurate computational results for Peclet number 1 and 4. ELM, Lagrangian interpolation scheme, and Stone,Brian scheme gave dissipation error and ELM, using cubic spline interpolation scheme, and QUICKEST scheme gave numerical oscillation for Peclet number 50. |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.28, no.4, 1995³â, pp.125-136
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920095959)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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