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:: Volume 11, Issue 41 (2020) ::
joc 2020, 11(41): 63-72 Back to browse issues page
Calculation of Spatial Variation of Bottom Friction Coefficient in the Persian Gulf
Akbar Rashidi Ebrahim Hesari , Rezvan Salami Abyaneh
Tarbiat Modares University , akbar.rashidi@modares.ac.ir
Abstract:   (564 Views)
In this research, a modified version of three dimensional hydrostatic finite element QUODDY-4 was used to calculate the spatial variation of bottom friction coefficient in the Persian Gulf. It differs from original one in using an external module for calculation of bottom friction coefficient which was added to the model. Spatial variation of bottom friction coefficient is calculated using a hydrodynamic approach in which relation between wave friction factor and other characteristics of bottom boundary layer is described with non-dimensional parameters like surface Rossby number, Reynolds number for flow and relative inertial frequencies. Results show that friction coefficient varies from 0.0005 to 0.006 in the Persian Gulf and in most places, spatially in regions with depth more than 50 meters, its value is less than default value of this coefficient in the numerical models. Consequently, usage of the constant value for friction coefficient in shallow oceanic basins and marginal seas like the Persian Gulf needs attention and special cares.
Keywords: Persian Gulf, bottom friction coefficient, QUODDY-4 Model
Full-Text [PDF 1417 kb]   (132 Downloads)    
Type of Study: Research | Subject: Physical Oceanography
Received: 2020/01/23 | Accepted: 2020/06/20 | ePublished: 2020/09/21
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Rashidi Ebrahim Hesari A, Salami Abyaneh R. Calculation of Spatial Variation of Bottom Friction Coefficient in the Persian Gulf. joc. 2020; 11 (41) :63-72
URL: http://joc.inio.ac.ir/article-1-1485-en.html


Volume 11, Issue 41 (2020) Back to browse issues page
نشریه علمی پژوهشی اقیانوس شناسی Journal of Oceanography
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