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Çѱ¹¼öÀÚ¿øÇÐȸ / v.28, no.5, 1995³â, pp.151-162
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ÀÚ¿¬ÇÏõ¿¡¼ ¿À¿°¹°ÁúÀÇ È¾È®»ê¿¡ °üÇÑ ¼öÄ¡¸ðÇü
( Numerical Investigation of Transverse Dispersion in Natural Channels ) |
| 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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| ÀÚ¿¬ÇÏõ¿¡¼ ¿À¿°¹°ÁúÀÇ È¾È®»ê°úÁ¤Àº Á¤È®ÇÏ°Ô ¸ðÀÇÇϱâ À§ÇÏ¿© 2Â÷¿ø À¯°üÈ®»ê¸ðÇüÀ» °³¹ßÇÏ¿´´Ù. º» ¸ðÇü¿¡¼´Â µ¶¸³º¯¼ö·Î¼ Ⱦ¹æÇâ°Å¸® ´ë½Å¿¡ Ⱦ¹æÇâ´©°¡À¯·®À» µµÀÔÇÏ¿´°í, ÇÏõÀÇ ÁÖÈ帧À» µû¶ó ÁÂÇ¥ÃàÀ» ¼³Á¤ÇÏ´Â ÀÚ¿¬ÁÂÇ¥°è¸¦ »ç¿ëÇÏ¿´´Ù. À¯µµÇÑ À¯°üÈ®»ê¹æÁ¤½ÄÀ» Ç®±â À§ÇÑ ¼öÄ¡¹æ¹ýÀ¸·Î¼ Eulerian-Lagrangian method¸¦ ÀÌ¿ëÇÏ¿´´Ù. À¯°üÈ®»ê¹æÁ¤½ÄÀ» ¿¬»êÀںи®¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© À̼ÛÀ» Áö¹èÇÏ´Â ¹æÁ¤½Ä°ú È®»êÀ» Áö¹èÇÏ´Â ¹æÁ¤½ÄÀ¸·Î ºÐ¸®ÇÏ¿´´Ù. ±×¸®°í À̼۹æÁ¤½ÄÀº Eulerian °è»ê°ÝÀÚ»ó¿¡¼ Ư¼º°î¼±¹ýÀ» ÀÌ¿ëÇÏ¿´°í È®»ê¹æÁ¤½ÄÀº Áß¾ÓÂ÷ºÐ¹ýÀ» ÀÌ¿ëÇÏ¿© ¼öÄ¡¸ðÀÇ ÇÏ¿´´Ù. º» ¿¬±¸¿¡¼´Â À̼۹æÁ¤½ÄÀÇ Ç®ÀÌ¿¡¼ »ç¿ëµÇ´Â º¸°£´ÙÇ×½ÄÀ¸·Î cubic spline º¸°£´ÙÇ×½ÄÀ» ÀÌ¿ëÇÏ¿´´Ù. º» ¿¬±¸¿¡¼ °³¹ßÇÑ ¸ðÇüÀ» Àû¿ëÇÏ¿© ½ÇÁ¦ ÀÚ¿¬ÇÏõ¿¡¼ ÇàÇØÁø Á¤»ó»óÅÂÀÇ »ö¼Ò½ÇÇè °á°ú¸¦ ¸ðÀÇÇÑ °á°ú°³¹ßµÈ ¸ðÇüÀÌ ¿ì¼öÇÑ °Åµ¿À» º¸À̰í ÀÖÀ½ÀÌ ¹àÇôÁ³´Ù. |
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| A two-dimensional stream tube dispersion model is developed to simulate accurately transverse dispersion processes of pollutants in natural channels. Two distinct features of the stream tube dispersion model derived herein are that it employs the transverse cumulative discharge as an independent variable replacing the transverse distance and that it is developed in a natural coordinate system which follows the general direction of the channel flow. In the model studied, Eulerian-Lagrangian method is used to solve the stream tube dispersion equation. The stream tube dispersion equation is decoupled into two components by the operator-splitting approach; one is governing advection and the other is governing dispersion. The advection equation has been solved using the method of characteristics and the results are interpolated onto Eulerian grid on which the dispersion equation is solved by centered difference method. In solving the advection equation, cubic spline interpolating polynomials is used. In the present study, the results of the application of this model to a natural channel are compared with a steady-state flow measurements. Simulation results are in good accordance with measured data. |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.28, no.5, 1995³â, pp.151-162
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920096239)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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