Implementation of Efficient Two-Way Mesoscale-Microscale Coupling Using Interpolating Metamodels

摘要

Coupling between prognostic mesoscale and microscale flow models has been suggested as a way to improve the accuracy of calculated flows around artificial structures and over densely-built areas. Nevertheless, implementations of full two-way mesoscale-microscale coupling are burdened by large scale mismatches as well as the formidable computational cost of on-line microscale calculations. In the present work, an efficient implementation of an effective two-way coupling between the mesoscale model MEMO and the microscale model MIMO, based on interpolating metamodels, is introduced. The performance of two different meta-model formulations is assessed using vertical flow profiles obtained from a two-way coupled mesoscale-microscale calculation in the urban area of Athens, Greece.