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Numerical investigation of turning diffuser performance: validation and verification

Nordin, Normayati and Abdul Karim, Zainal Ambri and Othman, Safiah and R. Raghavan, Vijay (2014) Numerical investigation of turning diffuser performance: validation and verification. In: 2nd Biannual Post Graduate Conference, 9th - 11th November 2014, Universiti Teknologi PETRONAS.

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Abstract

This paper aims to validate the numerical method used to intensively study the performance of turning diffuser. A 90o turning diffuser of area ratio, AR = 2.16 operated at inflow Reynolds numbers, Rein = 5.786 x 104 and 1.775 x 105 was considered. Hybrid grid with a large number of grid points located at the inner and outer walls was generated. The applicability of k-  turbulence models, i.e. standard k-  (ske), renormalization group k-  (rngke) and realizable k-  (rke) by means of adopting appropriate near wall treatments to simulate the actual cases, was assessed. The enhanced wall treatment adopted ske appeared as the best validated model, producing minimal deviation with comparable flow structures to the actual cases.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: CFD; turning diffuser; validation
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Energy and Thermofluid Engineering
Depositing User: Mrs. Normayati Nordin
Date Deposited: 09 Dec 2015 06:45
Last Modified: 09 Dec 2015 06:45
URI: http://eprints.uthm.edu.my/id/eprint/7397
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