Numerical simulation of atmospheric flow over complex terrain

Takanori Uchida, Yuji Ohya

Research output: Contribution to journalConference articlepeer-review

31 Citations (Scopus)


In order to develop an overall efficient and accurate method of simulating an unsteady three-dimensional atmospheric flow over topography, we examined two grid systems and corresponding variable arrangements: one is a body-fitted coordinate (BFC) grid system based on a collocated variable arrangement; the other is an orthogonal grid system based on a staggered variable arrangement. Using these codes, we calculated the wind system over topography such as an isolated hill and real complex terrain. Both codes remarkably removed the numerical difficulties such as the convergence of the SOR method in solving the pressure Poisson equation, resulting in numerical results with much higher accuracy. Despite the differences in the grid system and in variable arrangement, no significant differences in the flow pattern between the both numerical results were found. Compared with the previous studies, the numerical results obtained are very satisfactory in the sense that overall characteristic flows are successfully simulated irrespective of the simulation codes.

Original languageEnglish
Pages (from-to)283-293
Number of pages11
JournalJournal of Wind Engineering and Industrial Aerodynamics
Issue number1-3
Publication statusPublished - May 1999
EventProceedings of the 1998 International Workshop on CFD for Wind Climate in Cities - Hayama, Japan
Duration: Aug 24 1998Aug 26 1998

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Mechanical Engineering


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