Motion of Solid Spheres under Solitary Wave Attack: Physical and Numerical Modeling

Güler, Hasan Gökhan
Arıkawa, Taro
Baykal, Cüneyt
Göral, Koray Deniz
Yalçıner, Ahmet Cevdet
In this study, physical and numerical test are carried out focusing on the motion of two solid spheres under solitary wave attack. The numerical model CADMAS-SURF/3D-2F-DEM coupling a multiphase flow solver solving Reynolds Averaged Navier-Stokes Equations based on a porous body model and a discrete element method solver for Newton’s equations of motion is validated against the data of physical model experiments carried out in the wave flume of METU Ocean Engineering Research Center. Comparisons of the numerical simulations and physical model experiments show that the numerical model is capable of simulating the motion of solid spheres under solitary wave attack in a reasonably well accuracy. © 2018 American Society of Civil Engineers (ASCE). All rights reserved.
36th International Conference on Coastal Engineering, ICCE 2018


Nanoscale Thermal Transport in Single, Bilayer Graphene, and Graphite
Gholivand, Hamed; Donmezer, Nazli (2016-10-12)
In this study, ab-initio calculations were performed to obtain phonon dispersions of single, bilayer graphene, and graphite structures. Using these dispersions single mode relaxation times, thermal conductivities, and mean free paths (MFPs) have been calculated. Finally, calculated variables were used to understand the effects of additional layers to thermophysical properties, phonon mode contributions to thermal conductivity, and the limits for ballistic-diffusive heat transfer of single, bilayer graphene,...
Elliptical Pin Fins as an Alternative to Circular Pin Fins for Gas Turbine Blade Cooling Applications Part 2 Wake Flow Field Measurements and Visualization Using Particle Image Velocimetry
Uzol, Oğuz (null; 2001-06-07)
Extensive wake flow field measurements and visualizations are conducted using particle image velocimetry (PIV) inside the wakes of the elliptical and circular pin fin arrays in order to better understand the flow physics and the loss mechanisms of these devices. The true-mean velocity field inside the wake two diameters downstream of the pin fin arrays is obtained by collecting and ensemble averaging a large number of PIV samples in the midplane of the test section. Additional experiments are also conducted...
Stream gauging by combined use of surface PTV and CFD techniques in channel flows
GHARAHJEH, Sİamak; Aydın, İsmail (2015-07-03)
A video imagery technique for free surface velocity measuring is presented and used to calculate discharge for uniform open channel flows numerically. When the surface velocities are measured and used as boundary conditions on the water surface, velocity field can then be solved numerically to satisfy the surface boundary conditions. This approach can provide a precise tool for velocity field, discharge and boundary shear distribution calculation. PTV or particle tracking velocimetry is implemented over the...
Numerical Simulation of Rarefied Laminar Flow past a Circular Cylinder
Çelenligil, Mehmet Cevdet (2014-07-18)
Numerical simulations have been obtained for two-dimensional laminar flows past a circular cylinder in the transitional regime. Computations are performed using the direct simulation Monte Carlo method for Knudsen numbers of 0.02 and 0.2 and Mach numbers of 0.102 and 0.4. For these conditions, Reynolds number ranges from 0.626 to 24.63 and the flows are steady. Results show that separation occurs in the wake region for the flow with Mach number of 0.4 and Knudsen number of 0.02, but for the other eases flow...
Adjoint Shape Optimization of Hypersonic Blunt BodiesIncluding the Effect of Graphite Ablation
Onay, Oğuz; Eyi, Sinan (2016-07-11)
One of the aims of the study, is to develop a numerical analysis tool for thermochemical ablation problem under hypersonic flow conditions. The other aim is to include the effects of the graphite ablation to a design optimization tool which uses adjoint method. In this study, IRV2 geometry is selected as the original geometry and optimization study is performed under reacting flow conditions. Drag coefficient of the geometry is reduced without increasing the stagnation point temperature. After the optimizat...
Citation Formats
H. G. Güler, T. Arıkawa, C. Baykal, K. D. Göral, and A. C. Yalçıner, “Motion of Solid Spheres under Solitary Wave Attack: Physical and Numerical Modeling,” presented at the 36th International Conference on Coastal Engineering, ICCE 2018, Baltimore; United States, 2018, Accessed: 00, 2021. [Online]. Available: