Turbulent flow is a complicated process that frequently appears not only in nature but also in engineering applications. Numerical methods frequently are used to solve turbulent flow problems due to the trouble in solving Navier-Stokes equations. Navier-Stokes equations including inner pipe rotation effect are solved via two different numerical techniques. The efficiency of the proposed numerical technique is compared with the obtained solutions of Newton-Raphson method. The proposed method is computationally expensive, however, it may allow tackling the non-linearity of challenging problems in hydraulics. A mechanistic model including proposed numerical method is also developed in order to predict pressure gradient for fully developed turbulent flow through fully eccentric horizontal annulus including pipe rotation. Mathematical model is confirmed by the experimental study, which is conducted in Izmir Katip Celebi University. Türbülanslı akımlar, yalnızca doğada değil mühendislik uygulamalarında da görülen karmaşık bir yapıdadır. Navier-Stokes denklemlerinin türbülanslı çözümlerinin karmaşık ve zor olmasından dolayı sayısal yöntemler sıklıkla kullanılır. İki farklı sayısal teknik vasıtasıyla boru dönmesi hesaba katılmış Navier-Stokes denklemleri çözülmüştür. Geliştirilen sayısal yöntemin etkinliği Newton-Raphson method Computational Analysis With The Casino Tekniği elde edilen sonuçlarla karşılaştırılmıştır. Geliştirilen sayısal metot her ne kadar işlevsel olarak ağır olsa da, hidrolikteki linear olmayan zor problemlerin çözümünü sağlamaya yol açabilir. İç içe geçmiş borular arasından geçen tam gelişmiş türbülanslı akımın içteki borunun dönmesi etkili olduğu basınç farklarının tayini için geliştirilmiş sayısal metot ile birlikte bir mekanistik model geliştirilmiştir. Türkçe Turkish English. Teknik Dergi. Araştırma Makalesi. EN TR. PDF Kütüphaneme Ekle ×. Araştırma Oluştur Kapat. Öz Turbulent flow is a complicated process that frequently appears not only in nature but also in engineering applications. Anahtar Kelimeler eccentric annular flow; finite difference method; mechanistic modeling; newtonian fluid; pipe rotation; turbulent flow. Kaynakça Referans1 Deissler, R. Analysis of turbulent heat transfer, mass transfer, and friction in smooth tubes at high Prandtl and Schmidt numbers. Referans2 Deissler, R. Analysis of fully developed turbulent heat transfer and flow in an annulus with various eccentricities. NACA Tech. Note Referans3 Wolffe, R. The maximum velocity locus for axial turbulent flow in an eccentric annulus. AIChE Journal, 9 3 Referans4 Heyda, J. A Green's function solution for the case of laminar incompressible flow between non-concentric circular cylinders. Journal of the Franklin Institute, 1 Referans5 Jonsson, V. Results of laminar flow analysis and turbulent flow experiments for eccentric annular ducts. AIChE Journal, 11 6 Referans6 Jonsson, V.
MLA Ülker, Erman vd. Journal of Energy Resources Technology, 4 , Sürtünme faktörü , Taşınımla ısı geçişi , Boru demeti , Zamana bağlı Reynolds ortalamalı sayısal benzeşim , Sonlu hacimler yöntemi. An active fault tolerant control method based on support vector machines. Toggle navigation. Analysis of turbulent heat transfer, mass transfer, and friction in smooth tubes at high Prandtl and Schmidt numbers.
Assoc. Prof. DOGAN ENGİN ALNAK
Alnak D. E. Asst. EBRU ÖZTEKİN KULOĞLU. Personal Information. Academic Titles / Tasks. Office Phone: +90 Email: [email protected] Web: https://[email protected] Assistant Professor, Yildiz Technical University, Faculty Of Electrical & Electronics, Electrical Engineering Department. Computational Analysis of Heat and Mass Transfer of Impinging Jet onto Different Foods during the Drying Process at Low Reynolds Numbers. Prof. A Comprehensive Disturbing Effect Analysis of Multi-Sectional Rotor Slot Geometry for Induction Machines in Electrical Vehicles computational analysis.Effect of drillstring deflection and rotary speed on annular frictional pressure losses. Anahtar Kelimeler Friction factor , Convective heat transfer , Tube bundle , Unsteady Reynolds averaged numerical simulations , Finite volume method. International Journal of Thermal Science, 50, Investigation into the computational analysis of direct-transfer pre-swirl systems for gas turbine cooling. Nuclear Engineering and Design, , Journal of Turbomachinery, , Application of water repellent chemicals in domestic washing machines for knitted cotton sportswear ITTC 6. International Journal of Heat and Fluid Flow, 22 , Journal of Thermal Analysis and Calorimetry, , Axial laminar flow in an eccentric annulus: an approximate solution. The proposed method is computationally expensive, however, it may allow tackling the non-linearity of challenging problems in hydraulics. Araştırma Oluştur Kapat. Teknik Dergi. Durbin, P. Three-dimensional optimization of staggered finned circular and elliptic tubes in forced convection. Lavasani, A. Kapak Resmi İndir. Abdulsamed Lordoğlu Özgün Makale. Physics Fluids ,14, Simple method of predicting friction factors of turbulent flow in non-circular channels. International Journal of Heat and Mass Transfer, 16 5 , The staggered configurations result in greater Nusselt number and friction factor values compared to inline configurations. Isı Bilimi Ve Tekniği Dergisi, 43 2 , Referans2 Deissler, R. Flow of Newtonian and non-Newtonian fluids in concentric and eccentric annuli. Journal of Fluids and Structures,13, Application of field synergy principle for optimization fluid flow and convective heat transfer in a tube bundle of a pre-heater. Ansys-Fluent Ansys-Fluent Referans18 Mossa, M. Orantı katsayıları, iki boyutta elde edilen sonuçlara dayanarak üç boyutlu durumlar için tahminler elde etmek, başka bir deyişle 2B sonuçları 3B'ye aktarmak için uygulanır. A CFD study of flow quantities and heat transfer by changing a vertical to diameter ratio and horizontal to diameter ratio in inline tube banks using URANS turbulence models. Oclon, P. Chattopadhyay, H.
