Experimental Investigation of Porosity, Installation Angle, Thickness and Second Layer of Permeable Obstacles on Density Current

Document Type : Original Article


1 Department of Water science and Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

2 Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran


This study explored the effect of porosity and installation angle, thickness (dimension) and second layer of permeable obstacles on density current control and trapping in the laboratory. For this purpose, an insoluble suspended polymer and two types of groove and cavity obstacles made from plexiglass sheets were selected. The experiments were conducted with two different concentrations, five different porosities, four different angles, four different thicknesses and two obstacle layers. The results showed that the optimum porosities for cavity and groove obstacles were 22 and 19%, respectively. In all experiments, the cavity trapping rates of 0.13% and 0.14% at 10% and 20% concentrations were higher than those of groove trapping. In addition, by increasing the angle, the rate of trapping decreased and its value was observed in the groove with the correlation coefficients of 0.995 and 0.981 compared to the cavity. The major effect of obstacles was found to be the flow deceleration where the average velocity in the cavity was obtained 3.62% higher than that in the groove. For the increased thickness with 10% porosity and groove type, the passage of materials from the obstacle further increased. By creating the second layer of obstacle, the passage of materials from the obstacle in the both groove and cavity increased, and the optimal distance of the second obstacle was 2.25 m from the first one.


  1. Jawaduddin, M., Memon, S. A., Bheel, N., Ali, F., Ahmed, N., and Abro, A. W., “Synthetic Grey Water Treatment Through FeCl3-Activated Carbon Obtained from Cotton Stalks and River Sand.” Civil Engineering Journal, Vol. 5, No. 2, (2019), 340-348, doi: 10.28991/cej-2019-03091249.
  2. Alavi, S. R., Lay, E. N., and Makhmali, Z. A., “A CFD study of industrial double-cyclone in HDPE drying process”, Emerging Science Journal, Vol. 2, No. 1, (2018), 31-38, doi: 10.28991/esj-2018-01125.
  3. Li, N., Sheng, G. P., Lu, Y. Z., Zeng, R. J. and Yu, H. Q., “Removal of antibiotic resistance genes from wastewater treatment plant effluent by coagulation’, Water Research, Vol. 111,No. 1, (2017), 204-212, doi: 10.1016/j.watres.2017.01.010.
  4. Massoudinejad, M., Hashempour, Y., and Mohammad, H. “Evaluation of Carbon Aerogel Manufacturing Process in Order to Desalination of Saline and Brackish Water in Laboratory Scale.”, Civil Engineering Journal, Vol. 4, No. 1, (2018), 212-220, doi: 10.28991/cej-030980.
  5. Barahmand, N., and Shamsai, A., “Experimental and theoretical study of density jumps on smooth and rough beds, Lakes & Reservoirs” Research and Management, Vol. 15, No. 4, (2010) 285-306, doi: 10.1111/j.1440-1770.2010.00442.x.
  6. Hu, P., Cao, Z., Pender, G., and Tan, G., “Numerical modelling of turbidity currents in the Xiaolangdi reservoir, Yellow River, China”, Journal of Hydrology, Vol. 464, (2012), 41-53, doi: 10.1016/j.jhydrol.2012.06.032.
  7. Vladimirov, I.Y., Korchagin, N., and Savin, A., “Wave influence of a suspension-carrying current on an obstacle in the flow”, in  Doklady Earth Sciences, Springer Science & Business Media, (2015), 286-293, doi: 10.1134/S1028334X15030162.
  8. Farizan, A., Yaghoubi, S., Firoozabadi, B., and Afshin, H., “Effect of an obstacle on the depositional behaviour of turbidity currents”, Journal of Hydraulic Research, Vol. 57, No. 1, (2019), 75-89, doi: 10.1080/00221686.2018.1459891.
  9. Chamoun, S., De Cesare, G., and Schleiss, A.J., “Managing reservoir sedimentation by venting turbidity currents: A review”, International Journal of Sediment Research, Vol. 31, No. 3, (2016), 195-204, doi: 10.1016/j.ijsrc.2016.06.001.
  10. Asghari Pari, S.A., Kashefipour, S.M., and Ghomeshi, M., “An experimental study to determine the obstacle height required for the control of subcritical and supercritical gravity currents”, European Journal of Environmental and Civil Engineering, Vol. 21, No. 9, (2017), 1080-1092, doi: 10.1080/19648189.2016.1144537.
  11. Yaghoubi, S., Afshin, H., Firoozabadi, B., and Farizan, A., “Experimental investigation of the effect of inlet concentration on the behavior of turbidity currents in the presence of two consecutive obstacles”, Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol. 143, No. 2, (2016), 6018-6029, doi: 10.1061/(ASCE)WW.1943-5460.0000358.
  12. Keshtkar, MM. and Amiri, B., “Numerical simulation of radiative-conductive heat transfer in an enclosure with an isotherm obstacle”, Heat Transfer Engineering, Vol. 39, No. 1, (2018), 72-83, doi: 10.1080/01457632.2017.1280293.
  13. De Cesare, G., Oehy, C.D., and Schleiss, A.J., “Circulation in stratified lakes due to flood-induced turbidity currents”, Journal of Environmental Engineering, Vol. 132, No. 1, (2006), 1508-1517, doi: 10.1061/(ASCE)0733-9372(2006)132:11(1508).
  14. Asghari Pari, S. A., Habibagahi, G., Ghahramani, A., and Fakharian, K., “Improve the design process of pile foundations using construction control techniques.”, International Journal of Geotechnical Engineering, Vol. 1, No. 1, (2019), 1-8, doi: 10.1080/19386362.2019.1655622.
  15. Oehy, C.D., and Schleiss, A.J., “Control of turbidity currents in reservoirs by solid and permeable obstacles”, Journal of Hydraulic Engineering, Vol. 133, No. 6, (2007), 637-648, doi: 10.1061/(ASCE)0733-9429(2007)133:6(637).
  16. Kordnaeij, A., Kalantary, F., Kordtabar, B. and Mola-Abasi, H., “Prediction of recompression index using GMDH-type neural network based on geotechnical soil properties”, Soils and Foundations, Vol. 55, No. 6, (2015), 1335-1345, doi: 10.1016/j.sandf.2015.10.001.
  17. Asghari Pari, S.A, Habibagahi, G., Ghahramani, A. and Fakharian, K., “Reliability-Based Calibration of Resistance Factors in LRFD Method for Driven Pile Foundations on Inshore Regions of Iran”, International Journal of Civil Engineering, Vol. 17, No. 12, (2019), 1859-1870, doi: 10.1007/s40999-019-00443-0.
  18. Samadi-koucheksaraee, A., Ahmadianfar, I., Bozorg-Haddad, O., and Asghari-pari, S. A., “Gradient evolution optimization algorithm to optimize reservoir operation systems”, Water Resources Management, Vol. 33, No. 2, (2019) 603-625, doi: 10.1007/s11269-018-2122-2.
  19. Marosi, M., Ghomeshi, M., and Sarkardeh, H., “Sedimentation control in the reservoirs by using an obstacle”, Sadhana, Vol. 40, No. 4, (2015), 1373-1383, doi: 10.1007/s12046-015-0333-2.
  20. Alves, M., Gaillard, F., Sparrow, M., Knoll, M., and Giraud, S., “Circulation patterns and transport of the Azores Front-Current system”, Deep Sea Research Part II: Topical Studies in Oceanography, Vol. 49, No. 19, (2002), 3983-4002, doi: 10.1016/S0967-0645(02)00138-8.
  21. Nogueira, W., Litvak, L., Edler, B., Ostermann, J., and Büchner, A., “Signal processing strategies for cochlear implants using current steering EURASIP Journal on Advances in Signal Processing, Vol. 1, (2009), 213-224, doi: 10.1155/2009/531213.
  22. Janocko, M., Cartigny, M., Nemec, W., and Hansen, E., “Turbidity current hydraulics and sediment deposition in erodible sinuous channels: laboratory experiments and numerical simulations”, Journal of Marine Petroleum Geology, Vol. 41, (2013), 222-249, doi: 10.1016/j.marpetgeo.2012.08.012.
  23. McArthur, J. M., Sikdar, P. K., Nath, B., Grassineau, N., Marshall, J. D. and Banerjee, D. M., “Sedimentological control on Mn, and other trace elements, in groundwater of the Bengal Delta”, Journal of Marine Petroleum Geology, Vol. 46, No. 2, (2012), 669-676, doi: 10.1021/es202673n.
  24. Oshaghi, M. R., Afshin, H. and Firoozabadi, B., “Experimental investigation of the effect of obstacles on the behavior of turbidity currents”, Canadian Journal of Civil Engineering, Vol. 40, No. 4, (2013), 343-352, doi: 10.1139/cjce-2012-0429.
  25. Bogdanov, I. I., Mourzenko, V. V., Thovert, J. F. and Adler, P. M., “Effective permeability of fractured porous media in steady state flow”, Water Resources Research, Vol. 39, No. 1, (2003), 13-24, doi: 10.1029/2001WR000756.
  26. Abhari, M.N., Iranshahi, M., Ghodsian, M., and Firoozabadi, B., “Experimental study of obstacle effect on sediment transport of turbidity currents”, Journal of Hydraulic Research, Vol. 56, No. 5, (2018), 618-629, doi: 10.1080/00221686.2017.1397778.
  27. Wilson, R. I. and Friedrich, H., “Coupling of Ultrasonic and Photometric Techniques for Synchronous Measurements of Unconfined Turbidity Currents”, Water, Vol. 10, No. 9, (2018), 1246-1258, doi: 10.3390/w10091246.
  28. Tokyay, T., Constantinescu, G., and Meiburg, E., “Lock-exchange gravity currents with a high volume of release propagating over a periodic array of obstacles”, Journal of Fluid Mechanics, Vol. 672, (2011), 570-605, doi: 10.1017/S0022112010006312.
  29. Tokyay, T., Constantinescu, G., Gonzalez-Juez, E., and Meiburg, E., “Gravity currents propagating over periodic arrays of blunt obstacles: Effect of the obstacle size”, Journal of Fluids and Structures, Vol. 27, No. 6, (2011), 798-806, doi: 10.1016/j.jfluidstructs.2011.01.006.
  30. Nasr-Azadani, M., and Meiburg, E., “Turbidity currents interacting with three-dimensional seafloor topography”, Journal of Fluid Mechanics, Vol. 745, (2014), 409-443, doi: 10.1017/jfm.2014.47.