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Çѱ¹¼öÀÚ¿øÇÐȸ / v.36, no.5, 2003³â, pp.741-749
»ç´Ù¸®²ÃÇü»ó Åõ°ú¼º ¼öÁß¹æÆÄÁ¦¿¡ ÀÇÇÑ Á¤ÇöÆÄÀÇ Bragg ¹Ý»ç
( Bragg Reflection of Sinusoidal Waves due to Trapezoidal Submerged Porous Breakwaters )
ÀüÂùÈÄ;Á¶¿ë½Ä;ÀÌÁ¾ÀÎ; ÇѾç´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;ÇѾç´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿ø¿¬±¸ºÎ;
 
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º» ¿¬±¸¿¡¼­´Â »ç´Ù¸®²ÃÇü»ó Åõ°ú¼º ¼öÁß¹æÆÄÁ¦¿¡ ÀÇÇÑ Á¤ÇöÆÄÀÇ Bragg¹Ý»ç¿¡ ´ëÇØ ¼ö¸®¸ðÇü½ÇÇè°ú ¼öÄ¡¸ðÇü½ÇÇèÀ» ¼öÇàÇÏ¿´À¸¸ç, µÎ ½ÇÇè°á°ú¸¦ ºñ±³ÇÏ¿´´Ù. ¼öÄ¡ÇØ¼®¿¡ Àû¿ëµÈ ¸ðÇü¿¡¼­´Â °ø°£ Æò±ÕµÈ Wavier-Stokes ¹æÁ¤½ÄÀ» Åõ°úü ³»¿¡¼­ÀÇ Áö¹è¹æÁ¤½ÄÀ¸·Î »ç¿ëÇÏ¿´°í, ÀÚÀ¯¼ö¸éº¯À§¸¦ ÃßÀûÇϱâ À§ÇØ VOF±â¹ýÀ» Àû¿ëÇÏ¿´´Ù. ¼ö¸®½ÇÇè°á°ú¿Í ¼öÄ¡ÇØ¼®°á°ú´Â ºñ±³Àû Àß ÀÏÄ¡ÇÏ¿´À¸¸ç, Åõ°ú¼º ¼öÁß¹æÆÄÁ¦¿¡ ÀÇÇÑ ¹Ý»ç°è¼ö´Â ºÒÅõ°ú¼º¿¡ ºñÇØ ³·°Ô ³ªÅ¸³ª°í, ¹æÆÄÁ¦ÀÇ ¹è¿­ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ¹Ý»ç°è¼ö´Â Áõ°¡ÇÔÀ» º¸¿´´Ù.
This study presents a combined experimental and numerical effort to investigate experimentally and numerically the Bragg reflection of sinusoidal waves due to trapezoidal submerged porous breakwaters. Numerical predictions of the study are verified by comparing to laboratory measurements. In the numerical model, the flow in porous structures is described by the spatially averaged Navier-Stokes equations and the volume of fluid method is employed to track the free surface displacements. Numerical solutions are agree well with laboratory measurements. The reflection coefficients of porous structures are smaller than those of non-porous structures and become stronger in proportion to the increase of number of submerged breakwaters.
 
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¼öÁß¹æÆÄÁ¦;Bragg ¹Ý»ç;Á¤ÇöÆÄ;Åõ°úü;VOF¹ý;submerged breakwater;Bragg reflection;sinusoidal wave;porous structure;VOF method;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.36, no.5, 2003³â, pp.741-749
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311922024498)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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