Dr John OSullivan

Research | Current

My present research focus is computational fluid dynamics for environmental flows. Currently I am working in two main areas. The first is modelling flow through porous media and its application to geothermal reservoirs. This includes: improving geothermal reservoir models by including geological structural information; inverse modelling to assist with geothermal model calibration and enable uncertainty analysis of geothermal reservoir models; and using scripting and parallelisation to control large and complex models.

The second is modelling turbulent wind flow. This includes: developing accurate RANS closures for use with atmospheric flows; wall functions and other near wall treatments that can be used to simulate rough terrain; and simulation techniques for large, parallelised models.

Areas of expertise

My present research focus is computational fluid dynamics for environmental flows. Currently I am working in two main areas. The first is modelling flow through porous media and its application to geothermal reservoirs. This includes: improving geothermal reservoir models by including geological structural information; inverse modelling to assist with geothermal model calibration and enable uncertainty analysis of geothermal reservoir models; and using scripting and parallelisation to control large and complex models.

The second is modelling turbulent wind flow. This includes: developing accurate RANS closures for use with atmospheric flows; wall functions and other near wall treatments that can be used to simulate rough terrain; and simulation techniques for large, parallelised models.

Selected publications and creative works (Research Outputs)

As of 29 October 2020 there will be no automatic updating of 'selected publications and creative works' from Research Outputs. Please continue to keep your Research Outputs profile up to date.
  • Croucher, A., O'Sullivan M, O'Sullivan J, Yeh, A., Burnell, J., & Kissling, W. (2020). Waiwera: A parallel open-source geothermal flow simulator. COMPUTERS & GEOSCIENCES, 14110.1016/j.cageo.2020.104529
    Other University of Auckland co-authors: Michael O'Sullivan, Adrian Croucher
  • Bjarkason, E. K., O'Sullivan JP, Yeh, A., & O'Sullivan MJ (2019). Inverse modeling of the natural state of geothermal reservoirs using adjoint and direct methods. GEOTHERMICS, 78, 85-100. 10.1016/j.geothermics.2018.10.001
    Other University of Auckland co-authors: Michael O'Sullivan
  • Sylvania, M. S., O'Sullivan M, O'Sullivan J, & Brockbank, K. (2019). Modelling of Completion Tests in Two Wells of the Wairakei-Tauhara Geothermal System, New Zealand. IOP Conference Series: Earth and Environmental Science. 10.1088/1755-1315/254/1/012025
    Other University of Auckland co-authors: Michael O'Sullivan
  • Maclaren, O. J., Nicholson, R., Bjarkason, E. K., & O'Sullivan MJ (2018). Incorporating posterior model discrepancy into a hierarchical framework to facilitate out-of-the-box MCMC sampling for geothermal inverse problems and uncertainty quantification. Arvix Related URL.
    URL: http://hdl.handle.net/2292/45613
    Other University of Auckland co-authors: Oliver Maclaren, Michael O'Sullivan
  • Bjarkason, E. K., Maclaren, O. J., O'Sullivan JP, & O'Sullivan MJ (2018). Randomized Truncated SVD Levenberg-Marquardt Approach to Geothermal Natural State and History Matching. Water Resources Research, 54 (3), 2376-2404. 10.1002/2017WR021870
    Other University of Auckland co-authors: Oliver Maclaren, Michael O'Sullivan
  • McDowell, J., O'Sullivan M, O'Sullivan J, Ratouis, T., Gray, T., & Yeh, A. (2018). Uncertainty analysis of forecasting with the ohaaki reservoir model using PEST. Transactions - Geothermal Resources Council.
    Other University of Auckland co-authors: Michael O'Sullivan
  • Doherty, J., Yeh, A., Colina, R., Omagbon, J., O'Sullivan J, & OSullivan, M. (2017). EXPERIMENTS WITH INVERSE MODELLING AND UNCERTAINTY QUANTIFICATION WITH A GEOTHERMAL MODEL. Paper presented at International Geothermal Conference “GEOHEAT”, Petropavlovsk-Kamchatsky, Russian Federation. 5 September - 8 September 2017.
    URL: http://hdl.handle.net/2292/43378
    Other University of Auckland co-authors: Michael O'Sullivan
  • Ratouis, T. M., O'Sullivan MJ, Alcaraz, S. A., & O'Sullivan JP (2017). The effects of seasonal variations in rainfall and production on the aquifer and surface features of Rotorua geothermal field. Geothermics, 69, 165-188. 10.1016/j.geothermics.2017.05.003
    Other University of Auckland co-authors: Michael O'Sullivan

Contact details

Primary office location

UNISERVICES HOUSE - Bldg 439
Level 4, Room 405
70 SYMONDS ST
AUCKLAND 1010
New Zealand