Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2010
Thesis Language: Turkish
Student: Medine YİĞİT
Supervisor: Hacı Mehmet Şahin
Abstract:In this study, the effects of turbulence models which are utilized in the computational analyses whit a SAD trademark code programmer in a head changer spring-type turbulator. In the head changer, air as a hot fluid is passing through the pipe and a cold fluid also passes trough between the inner and outer pipes. this process has been realized under 3000≤Re≤18000 in the frame of continuous (laminar) and turbulence flow regimes. Numerical analyses found from the different turbulator models have been compared whit the experimental results in order to determine the best fitting model. In the simulations, ANSYS Fluent code packet using the ways volume method is utilized. It has been observed that solution ways of k- ANSYS Fluent code program model; the model of Standard-Standard wall function, Standard-Non-Equilibrium wall function, RNG-Standard wall function, RNG-Non-Equilibrium wall function, RNG-Enhanced wall treatment, Realizable-Standard wall function, Realizable-Non-Equilibrium Wall function Realizable-Enhanced wall treatment. The model of Standard-Standard wall function agree well with the experimental results.