Wall y&lt;SUP align=right&gt;+&lt;/SUP&gt; approach for dealing with turbulent flows over a wall mounted cube

Salim, Salim Mohamed; Ariff, Mohd Hisyam Mohd; Cheah, S. C.

doi:10.1504/pcfd.2010.035368

Cited by 49 publications

(34 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This led to a mesh containing ~2 million hexahedral cells. In addition, accurate prediction of pressure drop in flows with separation depends on resolving the velocity gradients normal to the wall, as prism layers allow the solver to resolve near wall flow accurately [47,48]. Hence, a 5-layer prism layer mesh with a total thickness of 0.0003 m and layer stretching factor of 1.5 was employed near the boundaries, as shown in Fig.…”

Section: Mesh Configurationmentioning

confidence: 99%

Verification of Turbulence Models for Flow in a Constricted Pipe at Low Reynolds Number

Khalili

Gamage

Mansy

2018

Proceeding of 3rd Thermal and Fluids Engineering Conference (TFEC)

View full text Add to dashboard Cite

Computational fluid dynamics (CFD) is a useful tool for prediction of turbulence in aerodynamic and biomedical applications. The choice of appropriate turbulence models is key to reaching accurate predictions. The present investigation concentrated on the comparison of different turbulence models for predicting the flow field downstream of a constricted pipe. This geometry is relevant to arterial stenosis in patients with vascular diseases. More specifically, the results of Unsteady Reynolds-Averaged Navier-Stokes (URANS) and scale resolving simulation (SRS) turbulence models such as Large Eddy Simulation (LES) and Detached Eddy Simulation (DES) were compared with experimental measurements. Comparisons included the mean flow and fluctuations downstream of the constriction. Results showed that the LES model was in better agreement with the velocity measurements performed using a Laser Doppler Anemometry (LDA). In addition, although URANS models predicted a wake region size and mean flow velocities comparable to SRS turbulence models, no small-scale vortical structures can be observed in the URANS solution due to the nature of these models. Modeling of these structures would, however, be helpful when more detailed flow behavior is needed such as in studies of acoustic sources. Hence, LES would be an optimal turbulence model for the flow under consideration, especially when sound generation would be of interest.

show abstract

Section: Mesh Configurationmentioning

confidence: 99%

Verification of Turbulence Models for Flow in a Constricted Pipe at Low Reynolds Number

Khalili

Gamage

Mansy

2018

Proceeding of 3rd Thermal and Fluids Engineering Conference (TFEC)

View full text Add to dashboard Cite

show abstract

“…The domain was discretized using hexahedral elements, incorporating recommendations by Salim et al (2010) and a wall y + 430 was achieved for all test meshes, which was determined to be the most suitable for RANS and LES. Three meshes were generated in order to assess the grid dependence of both numerical approaches and are summarized in Table 1.…”

Section: Computational Domain and Boundary Conditionsmentioning

confidence: 99%

Numerical simulation of atmospheric pollutant dispersion in an urban street canyon: Comparison between RANS and LES

Salim

Buccolieri

Chan

et al. 2011

Journal of Wind Engineering and Industrial Aerodynamics

247

104

View full text Add to dashboard Cite

“…Resolution is enhanced progressively at the vicinity of the tree (at the centre) to maximise numerical accuracy at regions of high solution gradients and reduce computational cost. This complies with recommendations based on the wall y C approach [20]. An inlet boundary condition is defined at the entrance while a pressure outlet is set at the exit of the domain to evacuate air.…”

Section: Computational Domain and Boundary Conditionsmentioning

confidence: 54%

Numerical Simulation of the Aerodynamic Loads on Trees During Storms

Gan

Salim

2015

Transactions on Engineering Technologies

View full text Add to dashboard Cite

Fluid-structure interactions for a single tree and a pair of trees with varying spacing subjected to gentle breeze and storm wind conditions were evaluated using Computational Fluid Dynamics (CFD). The generated velocity and pressure fields are then analysed using Finite Element Analysis (FEA) to determine the likelihood of tree damage due to the aerodynamic loads induced by the two wind conditions. It is observed that the pressure difference between the windward and leeward sides of the trees are much larger during the storm condition resulting in greater mechanical stresses and deformation magnitudes experienced by the tree trunks. Increasing the spacing between neighbouring trees resulted in larger aerodynamic loads on the sheltered trees downstream.

show abstract

Wall y<SUP align=right>+</SUP> approach for dealing with turbulent flows over a wall mounted cube

Cited by 49 publications

References 13 publications

Verification of Turbulence Models for Flow in a Constricted Pipe at Low Reynolds Number

Verification of Turbulence Models for Flow in a Constricted Pipe at Low Reynolds Number

Numerical simulation of atmospheric pollutant dispersion in an urban street canyon: Comparison between RANS and LES

Numerical Simulation of the Aerodynamic Loads on Trees During Storms

Contact Info

Product

Resources

About