CFD Modeling of the Atmospheric Boundary Layer in Short Test Section Wind Tunnel

Yassen, Yassen El-Sayed

doi:10.11648/j.ajae.s.2015020101.14

Cited by 3 publications

(5 citation statements)

References 25 publications

(31 reference statements)

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“…This system has been implemented in the non-university education system of the Autonomous Community of Galicia (Northwest Spain, a population of 2.7 million), which means that it is directly influencing a very large number of habitants of that region 33 : 58 997 children in infant school (3-6 years), 134 093 of primary school (6-12 years), 94 664 of compulsory secondary school (12)(13)(14)(15)(16), 31 371 of high school (16)(17)(18) and 31 366 of professional training centres. Add to these figures an additional 27 058 students of special adult education and 38 789 students of art and language centres and other special regimes.…”

Section: Discussionmentioning

confidence: 99%

“…This linear approach is, indeed, a rough estimation as the real profile is determined by the Atmospheric Layer (ABL) which is a non-trivial problem that also takes into consideration the nature of the terrain. 14,15 A detailed analysis of the problem shows that the linear approximation that was taken always considers smaller values for the velocity than the realistic values given by ABL (see the Appendix for details). As one of the leading factors in this project was to keep the safety inside the classrooms, we considered the linear approximation, as the effective ventilation is always going to be better than our estimate.…”

Section: Variations Of Co2 In a Room: Co2 Balance Equationmentioning

confidence: 99%

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Ventilation time recommendation system incorporating local meteorological data

Muñuzuri

Otero-Cacho

Mira

2022

Indoor and Built Environment

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Since the airborne transmission of SARS-CoV-2 is the key in the spread of COVID-19, the interest in the quality of the air in enclosed spaces has become utmost importance. Natural ventilation is the first obvious option to improve epidemiological security, and general rules have been widely disseminated. Nevertheless, the changes in weather conditions greatly limit the validity of such rules. Here we present a system that, upon the introduction of basic parameters of a given space, its volume, location, orientation, architectural environment and average occupancy, yields optimized ventilation times on the basis of wind meteorological forecasts. It has been successfully implemented in the educative system of the Autonomous Community of Galicia (northwest Spain) and it is currently operative.

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Section: Discussionmentioning

confidence: 99%

Section: Variations Of Co2 In a Room: Co2 Balance Equationmentioning

confidence: 99%

Ventilation time recommendation system incorporating local meteorological data

Muñuzuri

Otero-Cacho

Mira

2022

Indoor and Built Environment

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“…Smoother shaped ground obstacles, used in these wind tunnel tests, have resulted in lower number of elements required to perform proper meshing, compared with the previous analyses. Computations of the air flow within the defined control volume domain have been done by RANS equations, coupled with the SST k-ω turbulence model [19][20][21][22][23][24].…”

Section: Computation Methodologymentioning

confidence: 99%

“…The SST k-ω model is defined by the following equations, with several modifications added [19][20][21][22][23][24]:…”

Section: Theoretical Formulationmentioning

confidence: 99%

CFD Modeling of Atmospheric Boundary Layer Simulations in Wind Tunnels

et al. 2018

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Wind tunnel tests of wind influence on ground objects require proper experimental modeling of the atmospheric boundary layer (ABL). The authors have performed computational analyses with an aim to establish a reliable computational algorithm that could resemble complex flow patterns in wind tunnels with various obstacles, used to simulate appropriate velocity profiles within the ABL. For experimental verifications, measurements from two experimental facilities were applied, with speeds ranging from 1-4 m/s in the first, and 45 m/s in the second. For all considered cases, good agreements between the measured and computed speed profiles for operational engineering purposes have been achieved. In the sense of qualitative analyses, calculated contours of velocity magnitude and eddy viscosity inside the wind tunnel test sections have verified that good homogeneity of the simulated ABL in both wind tunnels had been established in the domains where velocity profiles were measured. Presented results have shown the capability of here established calculation model to resemble a number of costly wind tunnel test hours during preparations of proper obstacle arrangements for experimental ABL modeling in a wide wind speed range, and thus reduce the overall project costs. Also, presented CFD algorithm can readily be calibrated and used for engineering research of wind effects on different ground objects, as a virtual wind tunnel.

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“…The computational fluid dynamics (CFD) is a tool which has increasingly been used to study a wide variety of processes in the atmospheric boundary layer (ABL). There are several numerical models that can be employed in the simulation of the ABL due to their availability of appropriate boundary conditions and meteorological data [3,4]. One of them is a shear stress transport (SST) k-ω model which employs the k-ω model near the surface, and k- model in free flow.…”

Section: Introductionmentioning

confidence: 99%