In this study, turbulent flow around a tube bundle in non-orthogonal grid is simulated using the Large Eddy Simulation (LES) technique and parallelization of fully coupled Navier – Stokes (NS) equations. To model the small eddies, the Smagorinsky and a mixed model was used. This model represents the effect of dissipation and the grid-scale and subgrid-scale interactions. The fully coupled NS eq...

A four-way coupling scheme for the direct numerical simulation of particle-laden flows is developed and analyzed. It employs a multiple-relaxation-time lattice Boltzmann method with an adapted bulk viscosity to simulate fluid phase efficiently. The momentum exchange used couple particulate phase. particle interactions in normal tangential direction are accounted by discrete element using linear...

this note introduces a new general conjecture correlating the dimensionality dt of an infinitelattice with n nodes to the asymptotic value of its wiener index w(n). in the limit of large nthe general asymptotic behavior w(n)≈ns is proposed, where the exponent s and dt are relatedby the conjectured formula s=2+1/dt allowing a new definition of dimensionality dw=(s-2)-1.being related to the topol...

The concentration of PM2.5 in Delhi, one the most polluted capital cities globally, frequently exceeds Indian National Ambient Air Quality Standards, especially during post-monsoon and winter months. This study evaluates changes concentrations across Delhi using a way coupled model (WRF-CMAQ-AERMOD) for various hotspot-specific intervention scenarios 2018. reduced up to 15% by scaling down tota...