In this paper the Volume-of-Fluid (VOF) method is used to simulate Newtonian and non-Newtonian fluid flow within simplex (pressure-swirl) atomizers. The two-dimensional axisymmetric swirl Navier-Stokes equations coupled with the VOF method is employed for accounting the formation mechanism of the liquid film inside the swirl chamber and the orifice hole of the pressure swirl atomizer. For verification of the code, the numerical results were compared with experimental data for large scale prototype injector with water (Newtonian fluid) as injection fluid in various constant inlet mass flow rate. By using power-law equation to calculate shear stress terms in the Navier-Stokes equations, the code is extended to compute Newtonian and non-Newtonian fluid flow inside the atomizer. The time-independent purely viscous power-law fluids flow in pressure-swirl atomizers is simulated. The effects of shear-thinning fluids (0.5 < n <1), viscous Newtonian (n = 1) fluids and shear thickening fluids (1< n < 1.5) on atomizers performance (discharge coefficient and spray cone angle) were investigated. Results were shown that with increasing the power-law index the spray cone angle decreases and the discharge coefficient increases.
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ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis
July 12–14, 2010
Istanbul, Turkey
Conference Sponsors:
- International
ISBN:
978-0-7918-4917-0
PROCEEDINGS PAPER
Modeling of Non-Newtonian Fluid Flow Within Simplex Atomizers Available to Purchase
Mohammad Rezaeimoghaddam,
Mohammad Rezaeimoghaddam
Ferdowsi University of Mashhad, Mashhad, Iran
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Rasool Elahi,
Rasool Elahi
Ferdowsi University of Mashhad, Mashhad, Iran
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M. R. Modarres Razavi,
M. R. Modarres Razavi
Ferdowsi University of Mashhad, Mashhad, Iran
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Mohammad B. Ayani
Mohammad B. Ayani
Ferdowsi University of Mashhad, Mashhad, Iran
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Mohammad Rezaeimoghaddam
Ferdowsi University of Mashhad, Mashhad, Iran
Rasool Elahi
Ferdowsi University of Mashhad, Mashhad, Iran
M. R. Modarres Razavi
Ferdowsi University of Mashhad, Mashhad, Iran
Mohammad B. Ayani
Ferdowsi University of Mashhad, Mashhad, Iran
Paper No:
ESDA2010-25266, pp. 549-556; 8 pages
Published Online:
December 28, 2010
Citation
Rezaeimoghaddam, M, Elahi, R, Modarres Razavi, MR, & Ayani, MB. "Modeling of Non-Newtonian Fluid Flow Within Simplex Atomizers." Proceedings of the ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 3. Istanbul, Turkey. July 12–14, 2010. pp. 549-556. ASME. https://doi.org/10.1115/ESDA2010-25266
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