17 Apr 2023
 | 17 Apr 2023
Status: this preprint is open for discussion.

Introduction of a Trans-scale Numerical Simulation Framework Focusing on Urban Boundary Layer: WOCSS V1.0

Wei Li, Shuo Leng, Sunwei Li, Zhenzhong Hu, and Pakwai Chan

Abstract. In the field of geoscience, the meso-scale tool to conduct weather forecast, which is also termed as Numerical Weather Prediction (NWP) package, is commonly used for simulating the urban boundary layer in the scale of 1 km~100 km. In the field of wind engineering, the Computational Fluid Dynamic (CFD) simulation tool is most popular for investigating the urban wind environment at the scale of 1 m~1 km. In the present study, a novel framework, named WOCSS with the version v1.0, combing the meso-scale NWP package of the Weather Research and Forecast (WRF) model and the micro-scale OpenFOAM code is introduced thanks to an open-source package of PreCICE. In detail, PreCICE realizes the trans-scale simulation of the urban wind environment through one-way nesting of porting the meso-scale simulation results to the boundaries of the micro-scale simulation. To this end, the adaptions made to the open-sourced codes of WRF and OpenFOAM are articulated, which fulfil the information exchanges between WRF and OpenFOAM via PreCICE library. A case study concerning the urban wind environment in a residential quarter in Shenzhen, China is conducted using WOCSS V1.0. The case study demonstrates that the proposed framework successfully presents the detailed wind environment inside the residential quarter under realistic meteorological condition.

Wei Li et al.

Status: open (until 21 Jun 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-482', Anonymous Referee #1, 08 May 2023 reply
  • RC2: 'Comments on egusphere-2023-482', Anonymous Referee #2, 15 May 2023 reply

Wei Li et al.

Model code and software

WOCCS-v1.0 W. Li, S. Leng, S. Li, and Z. Hu

Wei Li et al.


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Short summary
A trans-scale simulation framework integrating the open-source WRF and OpenFOAM codes is proposed to numerically simulate the urban wind environment under specific weather conditions.