Abstract
A proper setting of boundary conditions is a standard upon which simulation results are justified. This study is specifically designed to simulate airflow over a repeating unit of simplified urban models with the application of periodic boundary condition. Similar setting of boundary conditions is used for all models which are of square layout with 25% packing density. The models are constructed with such that the initial velocity field is uniform throughout its internal domain. The results show that different domain heights of 4h and 5h (h as the building height) do not affect the spatial averaging of velocity profiles. In terms of the number of grids per building height, a finer meshing of 32 grids produce more accurate results of velocities and turbulence intensities compared with those of 25 grids when validated against the previous direct numerical simulation (DNS) data. Nevertheless, these criteria depend upon longer averaging period for better estimation of flow statistics. The boundary condition setting used in this preliminary study is nevertheless capable of producing current results comparable to past data although future works should focus on optimizing the important criteria in a simulation such as domain height, grid numbers, and averaging time.
| Original language | English |
|---|---|
| Title of host publication | Achievements in Engineering Sciences |
| Publisher | Trans Tech Publications |
| Pages | 1795-1799 |
| Number of pages | 5 |
| ISBN (Print) | 9783038350842 |
| DOIs | |
| Publication status | Published - Jan 1 2014 |
| Event | 3rd International Conference on Manufacturing Engineering and Process, ICMEP 2014 - Seoul, Korea, Republic of Duration: Apr 10 2014 → Apr 11 2014 |
Publication series
| Name | Applied Mechanics and Materials |
|---|---|
| Volume | 548-549 |
| ISSN (Print) | 1660-9336 |
| ISSN (Electronic) | 1662-7482 |
Other
| Other | 3rd International Conference on Manufacturing Engineering and Process, ICMEP 2014 |
|---|---|
| Country | Korea, Republic of |
| City | Seoul |
| Period | 4/10/14 → 4/11/14 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
A validation study for CFD simulation of a simplified urban model. / Mohammad, Ahmad Faiz; Zaki, Sheikh Ahmad; Ali, Mohamed Sukri Mat; Hagishima, Aya; Razak, Azli Abd.
Achievements in Engineering Sciences. Trans Tech Publications, 2014. p. 1795-1799 (Applied Mechanics and Materials; Vol. 548-549).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A validation study for CFD simulation of a simplified urban model
AU - Mohammad, Ahmad Faiz
AU - Zaki, Sheikh Ahmad
AU - Ali, Mohamed Sukri Mat
AU - Hagishima, Aya
AU - Razak, Azli Abd
PY - 2014/1/1
Y1 - 2014/1/1
N2 - A proper setting of boundary conditions is a standard upon which simulation results are justified. This study is specifically designed to simulate airflow over a repeating unit of simplified urban models with the application of periodic boundary condition. Similar setting of boundary conditions is used for all models which are of square layout with 25% packing density. The models are constructed with such that the initial velocity field is uniform throughout its internal domain. The results show that different domain heights of 4h and 5h (h as the building height) do not affect the spatial averaging of velocity profiles. In terms of the number of grids per building height, a finer meshing of 32 grids produce more accurate results of velocities and turbulence intensities compared with those of 25 grids when validated against the previous direct numerical simulation (DNS) data. Nevertheless, these criteria depend upon longer averaging period for better estimation of flow statistics. The boundary condition setting used in this preliminary study is nevertheless capable of producing current results comparable to past data although future works should focus on optimizing the important criteria in a simulation such as domain height, grid numbers, and averaging time.
AB - A proper setting of boundary conditions is a standard upon which simulation results are justified. This study is specifically designed to simulate airflow over a repeating unit of simplified urban models with the application of periodic boundary condition. Similar setting of boundary conditions is used for all models which are of square layout with 25% packing density. The models are constructed with such that the initial velocity field is uniform throughout its internal domain. The results show that different domain heights of 4h and 5h (h as the building height) do not affect the spatial averaging of velocity profiles. In terms of the number of grids per building height, a finer meshing of 32 grids produce more accurate results of velocities and turbulence intensities compared with those of 25 grids when validated against the previous direct numerical simulation (DNS) data. Nevertheless, these criteria depend upon longer averaging period for better estimation of flow statistics. The boundary condition setting used in this preliminary study is nevertheless capable of producing current results comparable to past data although future works should focus on optimizing the important criteria in a simulation such as domain height, grid numbers, and averaging time.
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UR - http://www.scopus.com/inward/citedby.url?scp=84901776805&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.548-549.1795
DO - 10.4028/www.scientific.net/AMM.548-549.1795
M3 - Conference contribution
AN - SCOPUS:84901776805
SN - 9783038350842
T3 - Applied Mechanics and Materials
SP - 1795
EP - 1799
BT - Achievements in Engineering Sciences
PB - Trans Tech Publications
ER -