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Volume 16, Issue 31 (4-2020)                   Marine Engineering 2020, 16(31): 1-11 | Back to browse issues page

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nayyer S, hosseini K, Kheirkhahan M. Wedge Impact Simulation into the Non-Newtonian Herschel-Bulkley Dilatant Fluid with RANS Numerical Method. Marine Engineering 2020; 16 (31) :1-11
URL: http://marine-eng.ir/article-1-768-en.html
Wedge Impact Simulation into the Non-Newtonian Herschel-Bulkley Dilatant Fluid with RANS Numerical Method
Shahab Nayyer1 , Khosrow Hosseini * 2, Mehran Kheirkhahan2
1- Faculty of civil engineering, Semnan University
2- Water engineering and hydraulic structures Group, Faculty of civil engineering, Semnan University
Abstract:   (4716 Views)
In the interaction of rigid body and fluid problem different methods and techniques are used for simulating the impact of a moving object in the fluids. So, wedge impact model is investigated according to the Dilatant fluid characteristics and the effect of these features on moving wedge using flow-3D software. Comparison of present analysis and observational results showed that this model with 0.5 percent mean error and with R2=0.999 has good performance in simulating this kind of fluid. Also Studying the effect of fluid characteristics changes on moving wedge and velocity and pressure distribution in fluid indicated that variety of density has maximum effect on the wedge velocity change, so that with 2.8 times increase in density, velocity of wedge decreases about 16 percent. Also, it was found that with decreasing in collision distance between two wedges, wedges penetration velocity into fluid decreases up to 8 percent.
Keywords: Fluid viscosity coefficient, Strain rate power, Fluid density, Shear thickening phenomenon Ditching problem
Full-Text [PDF 1188 kb]   (1722 Downloads)    
Type of Study: Research Paper | Subject: CFD
Received: 2019/10/4 | Accepted: 2020/02/8
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