a full scale physical model of a thin slab caster with a four-hole design submerged entry nozzle (sen) was constructed. on the basis of the dimensionless reynolds and froude similitude criteria, the fluid flow in a full-scale model is similar to that of the actual system and, hence, the data obtained from the water model can be applied to the actual system. in order to determine the optimum ope...

The paper shows the results of the convective heat transfer prediction in turbulent axisymmetric jets impinging onto a flat plate using the newest version (2006) of the k-ω turbulence model of Wilcox [1]. Improvements to the heat transfer predictions are obtained in the strongly strained flow regions with the impingement invariant proposed by Manceau [2] together with the F1 function proposed b...

Abstract A new concept design Catamaran Decommissioning Unit has been developed by Research Center for Hydrodynamics Technology Indonesia. The catamaran a unique shape, however in order to achieve resilient and sustainable the decommissioning unit as it resistance analysis both model testing numerical calculation must be conducted. value from needs validated with results towing tank. of scaling...

Shock wave/boundary layer interaction (SWBLI) is a highly critical problem that occurs in aircraft transonic or supersonic flow. This study performed CFD analysis of the ramp flow freestream Mach number 2.79. To secure reliability analysis, adaptive mesh refinement using gradient p sensor was used. Through this, grid sufficient resolution obtained for region shock wave, expansion and separation...

Abstract Numerical modeling of thermophysical processes in the air cooling channel titanium sponge reduction reactor is performed. The an area bounded by a retort filled with liquid magnesium and wall on which heating elements are mounted. Air flows inside channel, retort. A mathematical model constructed based unsteady Navier-Stokes equations axisymmetric formulation using k −ω SST turbulence ...

The performance of a recently developed “stabilized” turbulence (k−ω) closure model, which avoids un-physical over-production prior to wave breaking, is investigated in the computational fluid dynamics (CFD) simulation cross-shore sediment transport and breaker bar morphology. Comparisons are made with experiments as well results from simulations employing (otherwise identical) “standard” closu...

We report a non-perturbative study of the effects of shear flows on turbulence reduction in a decaying turbulence in two dimensions. By considering different initial power spectra and shear flows (zonal flows, combined zonal flows and streamers), we demonstrate how shear flows rapidly generate small scales, leading to a fast damping of turbulence amplitude. In particular, a double exponential d...

The conventional theory of resonance broadening for a two-species plasma in a magnetic field is revised, and applied to an ionospheric turbulence case. The assumptions made in the conventional theory of resonance broadening have, in the past, led to replacing the frequency ω by ω + ik ⊥ D in the resonant part of the linear dielectric function to obtain the nonlinear dielectric function. Where D...

The influence of the outer reinforcement layers on repair structure and aerodynamic performance was studied. Firstly, a continuous damage mechanics model established, 3D Hashin criterion cohesive zone material were used to analyze model. failure load deviation 5.5%. Secondly, basis γ−Reθ transition SST–ω turbulence model, analysis DU300 airfoil established. numerical simulation results showed t...