Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough Beds
Density current is produced because of a density contrast with the ambient fluid. This density difference can result from dissolved solids, suspended materials, temperature, etc. Density jumps significantly influence the quality characteristics of the gravity currents and the ambient fluid (e.g., la...
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| Format: | Article |
| Language: | fas |
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Marvdasht Branch, Islamic Azad University
2016-02-01
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| Series: | مهندسی منابع آب |
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| Online Access: | https://wej.marvdasht.iau.ir/article_1756_85817d4fedc294ca9c4f0662ea6e6fee.pdf |
| _version_ | 1797359782895550464 |
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| author | N. Barahmand |
| author_facet | N. Barahmand |
| author_sort | N. Barahmand |
| collection | DOAJ |
| description | Density current is produced because of a density contrast with the ambient fluid. This density difference can result from dissolved solids, suspended materials, temperature, etc. Density jumps significantly influence the quality characteristics of the gravity currents and the ambient fluid (e.g., lakes and reservoirs). In this research, using dimensional analysis and incomplete self-similarity method, these jumps were studied and a new equation was obtained for calculating the sequent depth ratio. This equation was validated using experimental results. Therefore, these experiments were carried out on both smooth and rough beds. The results indicate that the new relationship is more accurate than the classical equation; it was shown that the effects of both the entrainment ratio and the bed roughness are not negligible, even for their small amount. |
| first_indexed | 2024-03-08T15:28:46Z |
| format | Article |
| id | doaj.art-a909800bd66740cba3303c6f2e1d20cb |
| institution | Directory Open Access Journal |
| issn | 2008-6377 2423-7191 |
| language | fas |
| last_indexed | 2024-03-08T15:28:46Z |
| publishDate | 2016-02-01 |
| publisher | Marvdasht Branch, Islamic Azad University |
| record_format | Article |
| series | مهندسی منابع آب |
| spelling | doaj.art-a909800bd66740cba3303c6f2e1d20cb2024-01-10T08:07:47ZfasMarvdasht Branch, Islamic Azad Universityمهندسی منابع آب2008-63772423-71912016-02-0182773881756Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough BedsN. Barahmand0گروه مهندسی عمران، واحد لارستان، دانشگاه آزاد اسلامی، لارستان، ایران.Density current is produced because of a density contrast with the ambient fluid. This density difference can result from dissolved solids, suspended materials, temperature, etc. Density jumps significantly influence the quality characteristics of the gravity currents and the ambient fluid (e.g., lakes and reservoirs). In this research, using dimensional analysis and incomplete self-similarity method, these jumps were studied and a new equation was obtained for calculating the sequent depth ratio. This equation was validated using experimental results. Therefore, these experiments were carried out on both smooth and rough beds. The results indicate that the new relationship is more accurate than the classical equation; it was shown that the effects of both the entrainment ratio and the bed roughness are not negligible, even for their small amount.https://wej.marvdasht.iau.ir/article_1756_85817d4fedc294ca9c4f0662ea6e6fee.pdfdensity jumpdensity currentincomplete self-similarity methodsequent depth ratiorelative roughness |
| spellingShingle | N. Barahmand Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough Beds مهندسی منابع آب density jump density current incomplete self-similarity method sequent depth ratio relative roughness |
| title | Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough Beds |
| title_full | Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough Beds |
| title_fullStr | Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough Beds |
| title_full_unstemmed | Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough Beds |
| title_short | Using the Incomplete Self-Similarity Method for Estimation of the Conjugate Depth Ratio of Density Jumps on Smooth and Rough Beds |
| title_sort | using the incomplete self similarity method for estimation of the conjugate depth ratio of density jumps on smooth and rough beds |
| topic | density jump density current incomplete self-similarity method sequent depth ratio relative roughness |
| url | https://wej.marvdasht.iau.ir/article_1756_85817d4fedc294ca9c4f0662ea6e6fee.pdf |
| work_keys_str_mv | AT nbarahmand usingtheincompleteselfsimilaritymethodforestimationoftheconjugatedepthratioofdensityjumpsonsmoothandroughbeds |