Abstract

We are developing a Large Eddy Simulation (LES) solver to be used for simulations of turbulent flows in the planetary boundary layer (PBL). When a new model is developed it must be tested on canonical cases to verify model performance. In this seminar I will give an introduction to the theory behind LES and discuss methods for evaluating the performance of an LES solver. I will review three studies that test LES performance in three different cases: a neutral PBL, a convective PBL, and a stably stratified PBL (Jiang et al. 2018; Sullivan and Patton 2011; Sullivan et al. 2016).

Jiang, Q., Wang, S., & Sullivan, P. (2018). Large-Eddy Simulation Study of Log Laws in a Neutral Ekman Boundary Layer. Journal of the Atmospheric Sciences, 75(6), 1873–1889. https://doi.org/10.1175/JAS-D-17-0153.1

Sullivan, P. P., & Patton, E. G. (2011). The Effect of Mesh Resolution on Convective Boundary Layer Statistics and Structures Generated by Large-Eddy Simulation. Journal of the Atmospheric Sciences, 68(10), 2395–2415. https://doi.org/10.1175/JAS-D-10-05010.1

Sullivan, P. P., Weil, J. C., Patton, E. G., Jonker, H. J. J., & Mironov, D. V. (2016). Turbulent Winds and Temperature Fronts in Large-Eddy Simulations of the Stable Atmospheric Boundary Layer. Journal of the Atmospheric Sciences, 73(4), 1815–1840. https://doi.org/10.1175/JAS-D-15-0339.1

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