Murat Özbulut

Sabanci University, Faculty of Engineering and Natural Sciences, Post-Doc

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I have a PhD in Naval Architecture and Ocean Engineering, Istanbul Technical University. I have been working on violent free-surface flows, wave generation modeling, FSI, multiphase flows and electrohydrodynamics problems by SPH method since 2008.

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Papers by Murat Özbulut

Düzenli Dalgalar Üreten Bir Sayısal Dalga Tankının SPH Yöntemi ile Modellenmesi

Uludağ University Journal of The Faculty of Engineering

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A Numerical Investigation into the Correction Algorithms for SPH Method in Modeling Violent Free Surface Flows

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Investigation of 2D Nonlinear Free Surface Flows by SPH Method

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A Numerical Refinement Study on the SPH Modeling of the Violent Free Surface Flows

A comparative study of the numerical treatments that are commonly used in Smoothed Particle Hydro... more A comparative study of the numerical treatments that are commonly used in Smoothed Particle Hydrodynamics (SPH) together with relatively a new one, namely Artificial Particle Displacement algorithm is presented. As a benchmark study, two-dimensional dam-break problem is investigated by means of weakly compressible SPH approximation using Euler's equation of motion with artificial viscosity. After adopting standard SPH discretization schemes and equations without any numerical remedies, three different treatments are sequentially tested on the dam-break problem. In weakly compressible SPH approximation, the precise calculation of the densities of the particles is vital for the overall accuracy of the solution. In order to have an improved density field, a density correction algorithm is incorporated into the numerical algorithm as a basic numerical treatment. Subsequently, XSPH velocity variant algorithm [1] and artificial particle displacement (APD) algorithm [2] are implemented concurrently in conjunction with the density correction algorithm. The effects of each treatment on the calculated free surface profiles, pressure values and the total mechanical energy of the system are compared methodically. The effects of the numerical treatments particularly on the dynamic characteristics of the free surface flow in the dam-break test case are shown. The outcomes of the simulations show that density correction algorithm to large extent circumvents density fluctuation induced numerical issues in dam-breaking problem. It is further noted that the combined usage of the APD treatment and the density correction algorithm gives the most compatible results with those of the experimental studies.

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Murat Özbulut

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