Scott Ormiston

Area

Computational Fluid Dynamics (CFD), Thermo-fluid and Energy Systems

Expertise

Computational fluid dynamics, heat transfer, two-phase flow, numerical methods, CFD code development

Research description

Research involves: (1) fundamental CFD software development for two-phase models of falling films with strongly coupled interfacial heat and mass transfer, and (2) development of models in commercial CFD software for turbulent flow problems of interest to industry. New two-phase flow modelling methods have been developed to model falling films along with a gas phase in channels for condensation, absorption, and evaporation phenomena. The overall theme of applications has been for complex phenomena found in plate heat exchangers and shell-and-tube heat exchangers used in the power generation, refrigeration, and chemical processing industries. In support of this area, models have been developed for turbulent flow in tube bundles and corrugated plate channels. Other application areas have been branching gas-liquid flows, two-phase bubbly flow in an air-lift pump, aerosol transport and deposition, below grade heat losses from concrete slab building foundations with in-floor heating, and solar mass walls systems

Dr. Ormiston’s research is mainly focused on CFD with strongly coupled heat and mass transfer phenomena. His group has developed in-house codes for sharp interface two-phase models of falling films with adjacent gas mixtures. Condensation, evaporation, and absorption phenomena have been modelled. His group has also used CFX, Fluent, and STAR-CCM for single phase and two-phase flows for a variety of industry-related applications.

1. Y. Tohidi, S.J. Ormiston, Numerical analysis of evaporation from a falling film in a vertical parallel plate channel, International Journal of Heat and Mass Transfer, vol. 196, p. 123282 (15 pages), 2022.

2. R. Abbasi Havestini, S.J. Ormiston, Detailed two-phase numerical analysis of falling film absorption over a horizontal tube, International Journal of Heat and Mass Transfer, vol. 198, p. 123378 (21 pages), 2022.

3. Q.T. Le, S.J. Ormiston, H.M. Soliman, Detailed modeling of laminar film condensation from zeotropic binary mixtures in a vertical tube, International Journal of Heat and Mass Transfer, vol. 186, p. 122440 (11 pages), 2022.

4. D. Ghadge, V. Chatoorgoon, S.J. Ormiston, CFD study of supercritical flow stability in two heated parallel channels with wall thermal mass effects, Nuclear Engineering and Design, vol. 389, p. 111671 (11 pages), 2022.

5. S.J. Ormiston. A.R. Singh, CFD Analysis of Blade Coating from a Reservoir onto a Horizontal Substrate Using a Homogeneous Two-Phase Model, Canadian Journal of Chemical Engineering, vol. 100, pp. 349–362, 2022.

6. S.J. Ormiston. G.S. Gray, A Comparative Study of Closure Relations for CFD Modelling of Bubbly Flow in a Vertical Pipe, Open Journal of Fluid Dynamics, vol. 11, pp. 98–134, 2021.

7. M. Mohammadi, S. Vakilipour, S. Ormiston, Newton linearization of the Navier-Stokes equations for flow computations using a fully coupled finite volume method, Applied Mathematics and Computation, vol. 397, p. 125916 (20 pages), 2021.

8. S. Vakilipour, M. Mohammadi, S. Ormiston, A fully coupled ALE interface tracking method for a pressure-based finite volume solver, J. Computational Physics, vol. 427, p. 110054 (44 pages), 2021.

9. M. Guyot, S.J. Ormiston, H.M. Soliman, Numerical analysis of two-phase flow from a stratified region through two side branches, European Journal of Mechanics/B Fluid Mechanics, vol. 84, pp. 507–516, 2020.

10. D. Ghadge, V. Chatoorgoon, S.J. Ormiston, The effect of heat storage on supercritical flow stability in two heated parallel channels, International Journal of Heat and Mass Transfer, vol. 153, p. 119599 (12 pages), 2020.

11. R. Abbasi Havestini, S.J. Ormiston, An elliptic numerical analysis of water vapour absorption into a falling film in vertical parallel plate channels, International Journal of Heat and Mass Transfer, vol. 150, p. 119266 (13 pages), 2020.

12. B.-C. Wang, S. Ormiston, Guest editorial: 26th annual conference of the computational fluid dynamics society of Canada (CFD2018), Int. J. Numerical Methods for Heat & Fluid Flow, vol. 29, no. 7, p. 2178, 2019.

13. S. Vakilipour, M. Mohammadi, V. Badrkhani, S. Ormiston, Developing a physical influence upwind scheme for pressure-based cell-centered finite volume methods, Int. J. of Numerical Methods in Fluids, vol. 89, no. 1–2, pp. 43–70, 2019.

14. R. Abbasi Havestini, S.J. Ormiston, Fully coupled two-phase numerical model for falling film absorption in a vertical parallel plate channel, International Journal of Refrigeration, vol. 95, pp. 108–121, 2018.

15. F. Hassaninejadfarahani, S.J. Ormiston, Numerical Simulation of Film Condensation from Gas-Vapour Mixtures in Vertical Parallel Plate Channels, Computational Thermal Sciences, vol. 10, no. 4, pp. 321–335, 2018.

16. V. Martins Segunda, S.J. Ormiston, M.F. Tachie, Experimental and Numerical Investigation of Developing Turbulent Flow over a Wavy Wall in a Horizontal Channel, European Journal of Mechanics/B Fluid Mechanics, vol. 68, pp. 128–143, 2018.

17. S. Li, V. Chatoorgoon, S.J. Ormiston, Numerical study of oscillatory flow instability in upward flow of supercritical water in two heated parallel channels, International Journal of Heat and Mass Transfer, vol. 116, pp. 16–29, 2018.

18. M.K. Guyot, H.M. Soliman, S.J. Ormiston, Two-phase discharge from a stratified region through two horizontal branches with centerlines falling on an inclined plane, International Journal of Multiphase Flow, vol. 97, pp. 134–146, 2017.