"uuid","repository link","title","author","contributor","publication year","abstract","subject topic","language","publication type","publisher","isbn","issn","patent","patent status","bibliographic note","access restriction","embargo date","faculty","department","research group","programme","project","coordinates"
"uuid:08efee1b-d79e-45a2-9755-a3c96f3faf33","http://resolver.tudelft.nl/uuid:08efee1b-d79e-45a2-9755-a3c96f3faf33","Numerical simulation of turbulent heat transfer close to the critical point","Boersma, B.J.; Pecnik, R.; Nemati, H.; Peeters, J.W.R.","","2015","In this paper we discuss the effect of sharp property variations on the turbulent heat transfer in fluids close the critical point. The governing equations for this flow regime are discussed, a short description of the numerical tools that have been developed to study these flows is given. Finally, some results for supercritical heat transfer in developing turbulent pipe flow are presented.","turbulence; supercritical flows; heat transfer; direct numerical simulation","en","journal article","American Institute of Physics","","","","","","","","Mechanical, Maritime and Materials Engineering","Process and Energy","","","",""
"uuid:c7f5a261-e698-4d69-8da9-3c2a17be505d","http://resolver.tudelft.nl/uuid:c7f5a261-e698-4d69-8da9-3c2a17be505d","Direct numerical simulation of the interaction between unsheared turbulence and a free-slip surface","Campagne, G.; Cazalbou, J.B.; Joly, L.; Chassaing, P.","","2006","In this paper, direct numerical simulation is used to study the interaction between turbulence and a free surface. The configuration is original due to the fact that a random force generates turbulence in the vicinity of a plane parallel to the free surface. Turbulence is therefore statistically steady and nearly isotropic at some distance of the surface. A detailed description of the flow is provided, including second-order statistics and full Reynolds-stress budgets. It is shown that the results obtained in this configuration can help the understanding of intercomponent energy-transfer mechanisms.","turbulence; direct numerical simulation; free surface; random forcing","en","conference paper","","","","","","","","","","","","","",""
"uuid:feaa053c-1903-47ef-8564-38230a369c1d","http://resolver.tudelft.nl/uuid:feaa053c-1903-47ef-8564-38230a369c1d","Numerical Simulations of Competitive-Consecutive Reactions in Turbulent Channel Flow","Vrieling, A.J.","Nieuwstadt, F.T.M. (promotor)","2003","This thesis deals with mixing of passive scalars in a turbulent flow. The passive scalars are released in a turbulent plane channel flow and interpreted as either non-reactive components or reactive components that are involved in a competitive-consecutive reaction system. The evolution of these passive scalars under influence of turbulent mixing and chemical reaction is studied by means of Direct Numerical Simulation (DNS). For the non-reactive case, the mixing process behind two parallel line sources placed at a short distance from each other is studied and in particular the interference in the concentration statistics. The results of this study are interpreted as the concentration statistics resulting from two nearby stacks that release into the atmospheric boundary layer. For the reactive components, we study the downstream situation behind a source of species B placed in a background concentration of species A, where A and B are involved in the reaction system A+B => R, R+B => S and R is considered to be the desired reaction product. The rate of both reactions is determined by the combined influence of turbulent mixing and chemical kinetics. The primary influence on the course of this reaction system is found to be the hydrodynamics. The large scale turbulent fluctuations suppress the rate of the first reaction and enhance the rate of the second reaction. This effect could be an explanation for the anomalous high yields of S that are sometimes observed in experiments.","series-parallel reaction; turbulence; direct numerical simulation; passive scalar","en","doctoral thesis","","","","","","","","","Design, Engineering and Production","","","","",""