Articles | Volume 17, issue 7
Model description paper
05 Apr 2024
Model description paper |  | 05 Apr 2024

A one-dimensional urban flow model with an eddy-diffusivity mass-flux (EDMF) scheme and refined turbulent transport (MLUCM v3.0)

Jiachen Lu, Negin Nazarian, Melissa Anne Hart, E. Scott Krayenhoff, and Alberto Martilli

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Cited articles

Abdella, K. and Petersen, A.: Third-Order Moment Closure Through A Mass-Flux Approach, Bound.-Lay. Meteorol., 95, 303–318,, 2000. a
Agbaglah, G. and Mavriplis, C.: Three-dimensional wakes behind cylinders of square and circular cross-section: early and long-time dynamics, J. Fluid Mech., 870, 419–432,, 2019. a
Akinlabi, E., Maronga, B., Giometto, M. G., and Li, D.: Dispersive Fluxes Within and Over a Real Urban Canopy: A Large-Eddy Simulation Study, Bound.-Lay. Meteorol., 185, 93–128,, 2022. a, b
Ayotte, K. W., Finnigan, J. J., and Raupach, M. R.: A Second-Order Closure for Neutrally Stratified Vegetative Canopy Flows, Bound.-Lay. Meteorol., 90, 189–216,, 1999. a
Best, M. J. and Grimmond, C. S. B.: Key Conclusions of the First International Urban Land Surface Model Comparison Project, B. Am. Meteorol. Soc., 96, 805–819,, 2015. a
Short summary
This study enhances urban canopy models by refining key assumptions. Simulations for various urban scenarios indicate discrepancies in turbulent transport efficiency for flow properties. We propose two modifications that involve characterizing diffusion coefficients for momentum and turbulent kinetic energy separately and introducing a physics-based mass-flux term. These adjustments enhance the model's performance, offering more reliable temperature and surface flux estimates.