@article{article_1007351, title={Two-Phase Numerical Modelling of a Wet Exhaust System in a Catamaran Motor Yacht Diesel Engine}, journal={Avrupa Bilim ve Teknoloji Dergisi}, pages={165–170}, year={2021}, DOI={10.31590/ejosat.1007351}, author={Cambaz, Alihan and Görgülü, Yasin Furkan and Arat, Halit}, keywords={Islak egzoz sistemi, Deniz dizel motoru, CFD, Termal performans, İki fazlı akış.}, abstract={In this study, the multiphase temperature distributions and volume fractions through wet exhaust system were investigated as 3D by using comprehensive numerical model in a yacht diesel engine. For this purpose, Volume of Fluid multiphase model was selected as the numerical model. Fuel exhausts are generally located underwater to ensure a modern yacht appearance and minimize exhaust noise. To manage water pressure, exhaust gases, and cooling water flow distribution, a scoop is positioned above the catamaran yacht exhaust. Besides, two types of fluids have been used one of which is the hot exhaust gas the other one is the cooling water used in the nozzle. The design has been created using Ansys SpaceClaim and the cooling water is sprayed from the 60° tip of the nozzle. Moreover, the mesh used in the simulation has 1,405,113 elements and 523,125 nodes and the average mesh skewness is 0.46, the average orthogonal quality of the mesh is 0.64. Realizable k-ε turbulence model has been used in the simulations. According to results, the flow fully develops after the time of 1.5 seconds and the water nozzle sprays the water along the tube cools the exhaust gases. Also, the stagnation points occurring at the elbow fitting of the tube are striking when the velocity contours and velocity vectors are examined.}, number={31}, publisher={Osman SAĞDIÇ}