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Çѱ¹¼öÀÚ¿øÇÐȸ / v.28, no.4, 1995³â, pp.215-222
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´Ù°ø¼º ¸ÅÁú¿¡¼ ÀÌ·ÂÇö»ó¿¡ ´ëÇÑ ½ÇÇèÀû ¿¬±¸
( Experimental Study on Hysteresis Phenomena in Porous Media ) |
| °¿ì¿µ;¹ÚÀçÇö; ¼¿ï´ëÇб³ Åä¸ñ°øÇаú;¼¿ï´ëÇб³ Åä¸ñ°øÇаú ¹Ú»ç°úÁ¤¼ö·á, Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿ø¿¬±¸½Ç ¼±ÀÓ¿¬±¸¿ø, ¼¿ï´ëÇб³ Åä¸ñ°øÇаú;
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| ºñÆ÷È È帧ÀÇ Áö¹è¹æÁ¤½ÄÀÎ Richards½ÄÀ» ¼öÄ¡ÇØ¼®Çϱâ À§ÇØ ÇÊ¿äÇÑ ¹°º¸À¯ÇÔ¼ö´Â ÀÌ·ÂÇö»óÀ» °¡Áö°í ÀÖÀ¸¸ç ÀÌ·¯ÇÑ ÀÌ·ÂÇö»óÀº ºñÆ÷È È帧Ư¼º¿¡ Áß¿äÇÑ ¿µÇâÀ» ¹ÌÄ£´Ù. º» ¿¬±¸¿¡¼´Â Åä¾ç½Ã·áÀÇ ¹°º¸À¯ÇÔ¼ö ½ÇÃøÄ¡¸¦ ÀÌ¿ëÇÏ¿© ±âÁ¸ÀÇ ÀÌ·ÂÇö»ó ¸ðÇüµéÀÇ Á¤È®¼ºÀ» °ËÅäÇÏ¿´´Ù. À̸¦ À§ÇØ ¹°º¸À¯ÇÔ¼ö ÀÌ·ÂÇö»óÀ» ½ÇÃøÇÒ ¼ö ÀÖ´Â ½ÇÇèÀåÄ¡¸¦ °³¹ßÇÏ¿© ±¹³» Åä¾ç½Ã·á¸¦ ´ë»óÀ¸·ÎÇÑ ÁÖÁ¥À½°úÁ¤°ú ÁÖ¸¶¸§°úÁ¤ÀÇ ½ÇÃøÄ¡¸¦ ±¸ÇÏ¿´°í, ÀÌ ÀÚ·á·ÎºÎÅÍ ¹°º¸À¯ÇÔ¼ö ÃßÁ¤½ÄÀÎ van Genuchten½ÄÀÇ ¸Å°³º¯¼ö¸¦ ÃßÁ¤ÇÏ¿´´Ù. ÃßÁ¤µÈ ÁÖÁ¥À½°î¼±À» ÀÌ·ÂÇö»ó ¸ðÇüÀÎ Model I-1(Mualem), Model II-1(Mualem) °ú Model III-2(¹Ú°ú ¼±¿ì)¿¡ Àû¿ëÇÏ¿© ÁÖ¸¶¸§°î¼±À» ¸ðÀÇÇÑ °á°ú, Model I-1ÀÇ ¸ðÀǰÀº ÁÖ¸¶¸§°î¼±ÀÇ ½ÇÃøÄ¡¸¦ °ú´ë ¸ðÀÇÇϰí Model II-1Àº °ú¼Ò ¸ðÀÇÇÏÁö¸¸ Model III-2´Â ½ÇÃøÄ¡¿¡ ±ÙÁ¢ÇÏ°Ô ¸ðÀÇÇÏ¿´´Ù. |
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| The water retention function which has the hysteresis phenomena is required to analyze the Richards equation which is a governing equation of the unsaturated flow, and its hysteresis phenomena has influence upon the characteristics of the unsaturated flow. The accuracy of the published hysteresis models is compared by using experimental data of the water retention function. The apparatus to experiment the hysteresis phenomena on the soil is developed, and experimental data for the main wetting process and the main drying process of the water retention function are obtained. The parameters of the van Genuchten equation are calibrated by using experimentally obtained data. As a result of the comparison of the selected hysteresis models which simulate the main drying curve from the main wetting curve, the Model I-1(Mualem) overestimates and the Model II-1(Mualem) underestimates but the Model III-2(Park and Sonu) similarly estimates the experimental data of the main drying curve. |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.28, no.4, 1995³â, pp.215-222
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920096039)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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