Application of GPU-Based Large Eddy Simulation in Urban Dispersion Studies

Kristof, Gergely [Kristóf, Gergely (Áramlástan), szerző] Áramlástan Tanszék (BME / GPK); Papp, Balint [Papp, Bálint (Áramlástan), szerző] Áramlástan Tanszék (BME / GPK)

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: ATMOSPHERE 2073-4433 9 (11) Paper: 442 , 22 p. 2018
  • SJR Scopus - Environmental Science (miscellaneous): Q2
    While large eddy simulation has several advantages in microscale air pollutant dispersion modelling, the parametric investigation of geometries is not yet feasible because of its relatively high computational cost. By assuming an analogy between heat and mass transport processes, we utilize a Graphics Processing Unit based softwareoriginally developed for mechanical engineering applicationsto model urban dispersion. The software allows for the modification of the geometry as well as the visualization of the transient flow and concentration fields during the simulation, thus supporting the analysis and comparison of different design concepts. By placing passive turbulence generators near the inlet, a numerical wind tunnel was created, capable of producing the characteristic velocity and turbulence intensity profiles of the urban boundary layer. The model results show a satisfactory agreement with wind tunnel experiments examining single street canyons. The effect of low boundary walls placed in the middle of the road and adjacent to the walkways was investigated in a wide parameter range, along with the impact made by the roof slope angle. The presented approach can be beneficially used in the early phase of simulation driven urban design, by screening the concepts to be experimentally tested or simulated with high accuracy models.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2021-10-16 02:50