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Çѱ¹¼öÀÚ¿øÇÐȸ / v.43, no.10, 2010³â, pp.911-920
¼ö¿Â¼ºÃþÈ帧¿¡¼­ ¹Ù¶÷¿¡ ÀÇÇØ ¹ß»ýÇÏ´Â ¼øÈ¯È帧À» ÇØ¼®Çϱâ À§ÇÑ ¼öÄ¡¸ðÇü°³¹ß
( A Numerical Model for Wind-Induced Circulation in a Thermally Stratified Flow )
ÀÌÁø¿ì;±èÇüÁØ;Á¶¿ë½Ä; ÇѾç´ëÇб³ °Ç¼³È¯°æ°øÇаú;ÇѾç´ëÇб³ °Ç¼³È¯°æ°øÇаú(Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ÇÏõ.ÇØ¾ÈÇ׸¸¿¬±¸½Ç);ÇѾç´ëÇб³ °Ç¼³È¯°æ°øÇаú;
 
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Àú¼öÁö¿Í °°Àº °¤ÇôÁø ¼öü´Â »ó·ù¿¡¼­ À¯ÀԵǴ ¿À¿°¹°Áú »Ó¸¸ ¾Æ´Ï¶ó ¼ºÃþÇö»ó¿¡ ÀÇÇØ¼­µµ ¿À¿°µÉ ¼ö ÀÖ´Ù. °¤ÇôÁø ¼öü¿¡¼­ÀÇ ¿¬Á÷¼øÈ¯Àº ÀÌ·¯ÇÑ ¿À¿°À» ÁÙÀ̴µ¥ Áß¿äÇÑ ¿ªÇÒÀ» Çϴµ¥, ¿¬Á÷¼øÈ¯À» ÀÏÀ¸Å°´Â ÀÎÀڷδ ºûÀÇ ÀÔ»ç, ¹Ù¶÷, ¹°ÀÇ ¿Âµµ ¹× ¿­ÀÇ È®»ê µîÀÌ ÀÖÀ¸¸ç, ±×Áß¿¡¼­µµ °¡Àå Áß¿äÇÑ °ÍÀº ¹Ù¶÷ÀÇ ¿µÇâÀÌ´Ù. ±×·¯¹Ç·Î ¼ºÃþÈ­µÈ È帧¿¡¼­ ¹Ù¶÷¿¡ ÀÇÇØ ¹ß»ýÇÏ´Â ¿¬Á÷¼øÈ¯¿¡ ´ëÇÑ ¼öÄ¡¸ðÇüÀ» °³¹ßÇϰí Àû¿ëÇÏ´Â °ÍÀÌ ÇÊ¿äÇÏ´Ù. º» ¿¬±¸´Â ¼ö¿Â¼ºÃþÈ帧À» ÇØ¼®ÇÒ ¼ö ÀÖ´Â 3Â÷¿ø ¼öÄ¡¸ðÇüÀ» Á¦½ÃÇÏ¿´´Ù. À¯¼Ó¼ººÐÀºx-Ãà°ú y-Ãà ¹æÇâ¿¡¼­ÀÇ ¿îµ¿·®¹æÁ¤½ÄÀ¸·ÎºÎÅÍ 3´Ü°è¿¡ °ÉÃÄ °è»êµÇ°í, ÀÚÀ¯¼ö¸é º¯À§¿Í ¿Âµµº¯È­ µîÀÇ ½ºÄ®¶ó¾çÀº °¢°¢ ÀÚÀ¯¼ö¸é¹æÁ¤½Ä°ú À̼Û-È®»ê ¹æÁ¤½ÄÀ¸·ÎºÎÅÍ °è»êµÈ´Ù. º» ¿¬±¸¿¡¼­ Á¦½ÃÇÑ ¸ðÇüÀÇ Á¤È®µµ¸¦ °ËÁõÇϱâ À§ÇÏ¿© Á¤»ç°¢Çü¼öÁ¶¿¡¼­ Áøµ¿ÇÏ´Â ÀÚÀ¯¼ö¸éÀÇ ÇØ¼®ÇØ¿Í ºñ±³ÇÏ¿´°í, ¼ºÃþÈ­µÈ È帧¿¡¼­ ¹ß»ýÇÏ´Â ¿¬Á÷¼øÈ¯¿¡ ´ëÇÏ¿© ¼öÄ¡¸ðÀǸ¦ ½Ç½ÃÇÏ¿´´Ù. ±× °á°ú, º» ¿¬±¸¿¡¼­ °³¹ßµÈ ¼öÄ¡¸ðÇüÀÌ È帧 ³»ºÎÀÇ Çö»óÀ» Àß ¹¦»çÇÔÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
The closed water bodies, such as reservoirs and lakes, could be contaminated by an inflow of pollutants in the upstream as well as a stratification caused by seasonal natural phenomena. The vertical circulation particularly plays an important role in reduction of environmental pollutants. The factors of the vertical circulation are the temperature, wind, thermal diffusivity and sunlight. The wind is probably the most significant factor among them. Thus, it is necessary to describe the validation and application of a three-dimensional numerical model of wind-induced circulation in a thermally stratified flow. In this paper, a three-dimensional numerical model for the thermally stratified flows is presented. The model is conducted in three steps to calculate the velocity components from the momentum equations in x- and y- axis directions, the elevations from the free surface equation and the temperature from the scalar transport equation. Numerical predictions are compared with available analytical solutions for the sloshing free surface movement in a rectangular basin. The numerical results generally show a reasonable agreement with analytical solutions. And the model is applied to the circulation for the wind induced flow in a thermally stratification. Consequently, the developed model is validated by two verifications and phenomena of the internal flow.
 
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µ¿¼ö¾Ð ¸ðÇü;ÀÚÀ¯¼ö¸é ±³Á¤;µ¿¼ö¾Ð ±³Á¤;¼ö¿Â¼ºÃþÈ帧;TVD scheme;free surface correction;hydrostatic pressure;thermally stratified flow;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.43, no.10, 2010³â, pp.911-920
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201032654094305)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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