Searched for: subject%3A%22viscous%255C+flow%22
(1 - 19 of 19)
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Sheng, Yue (author), Jin, Sheng (author), Comeau, M.J. (author), Hou, Zengqian (author), Zhang, Letian (author), Wei, Wenbo (author), Ye, Gaofeng (author)
The Dinggye region, in the central part of the Himalayan orogenic belt, includes the southern part of the Xainza-Dinggye rift and the Mabja Gneiss Dome with leucogranite cores. Previous studies of gneiss domes in this region report the existence of channel flow processes or tectonic exhumation, in addition to partial melting of orogenic mid...
journal article 2023
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Barsom, Bavly (author)
Supersonic intakes are essential in assuring proper combustion for operating ramjet engines on cruise missiles. However, due to increasing threats and a rapidly changing service environment, today's intakes do not fit anymore to comply with the new set of requirements to tackle the above challenges. Therefore, a novel supersonic intake design is...
master thesis 2021
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Pouw, Dennis (author)
In order to decrease the time that the viscous-flow solver PARNASSOS needs to simulate ship-generated waves, direct solvers are introduced in order to make the iterative solver used in PARNASSOS converge faster
master thesis 2021
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Stampoultzoglou, Tasos (author)
For many types of floating structures, roll motion is the most important wave induced motion. More specifically, roll motion is of high significance for barges, in order to correctly predict the acceleration of the structure caused by roll motion and determine the procedure of sea-fastening and off-loading. The correct forecast of roll motion...
master thesis 2017
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Van Beek, V.M. (author)
Backward erosion piping is an internal erosion mechanism during which shallow pipes are formed in the direction opposite to the flow underneath water-retaining structures as a result of the gradual removal of sandy material by the action of water. It is an important failure mechanism in both dikes and dams where sandy layers are covered by a...
doctoral thesis 2015
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Botella, O. (author), Cheny, Y. (author)
We present a new Cartesian grid method for the computation of incompressible viscous flows in irregular geometries. The irregular boundary is implicitly represented by its signed distance function (the level-set function) and, by using level-set calculus tools, we are able to preserve the Cartesian structure of the discretized Navier-Stokes...
conference paper 2006
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Dorodnicyn, L.W. (author)
The previous theory of artificial boundary conditions in gas dynamics has been elaborated mostly for the Euler equations. However, in practice, such boundary treatments are applied to discrete methods to solution of gasdynamic problems. In this study, based on exact nonreflecting boundary conditions for the 1D linearized Euler equations, we...
conference paper 2006
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Vigneron, D. (author), Deliége, G. (author), Essers, J.A. (author)
This paper presents a density-based finite volumes method for solving the unsteady Navier-Stokes equations on 3D unstructured grids. The second order Crank-Nicolson scheme is applied to perform the time integration. At each time step, the system of non linear equations is solved by means of a fully implicit dual time stepping method. An...
conference paper 2006
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Prananta, B.B. (author)
doctoral thesis 1999
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Oosterlee, C.W. (author), Wesseling, P. (author)
report 1991
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Velldman, A.E.P. (author), Lindhout, J.P.F. (author), de Boer, E. (author)
A description is given of VISIAN - a simulation method for 2-D viscous flows with strong viscous-inviscid interaction. The mathematical mode and the numerical algorithm are presented. VISIAN has been coupled with the inviscid-flow solver TRAPS. Results are shown for a number of airfoils; a comparison is made with results from other computations...
report 1988
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Veldman, A.E.P. (author), Vogels, M.E.S. (author)
A mathematical model is presented for the description of axisymmetric three-dimensional transient flow of a viscous liquid in a partially filled cylindrical container under low gravity conditions. The mathematical model consists of the Navier-Stokes equations with either no-slip condition at the solid boundaries, and with the continuity of...
report 1986
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Labruijere, T.E. (author)
A program system has been developed as a tool for interactive analysis and design of multi-element airfoils in incompressible viscous flow. A global description of the system is given. It involves the application of three computational methods, one for the analysis of viscous flow and one for the analysis of inviscid flow around multi-element...
report 1983
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van Egmond, J.A. (author), van den Berg, B. (author), Labrujere, T.E. (author)
At NLR a system for the computational design on multi-element airfoil has been developed. This design system solves the inverse aerodynamic problem in an approximate way. A priori specified aerodynamic requirements (surface pressure distribution) and geometric requirements are minimized in a least-squares way, introducing weight factors to...
report 1983
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Veldman, A.E.P. (author), Lindhout, J.P.F. (author)
An outline is presented of a new code, called VISIAN, for the analysis of aerodynamic flows with strong viscous-inviscid interaction. The code is based on the recently developed quasi-simultsuieous method for the calculation of strongly interacting boundary layers. The feasibility of this method has already been demonstrated liy means of a...
report 1983
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Houwink, R. (author)
An outline is given of a first version of the computer programme LTRAFV for coupled unsteady transonic flow/turbxilent boundary layer computations. It is a combination of the LTRAN2-NLR programme and the lagentrainment method of Green. A comparison is made of theoretical and experimental results for the NACA64A006 airfoil with oscillating flap...
report 1981
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Lindhout, J.P.F. (author), van den Berg, B. (author), Elsenaar, A. (author)
At the workshop nine participants presented the results of their calculations for a practical test case. The test case deals with the 3D turbulent boundary layer development, including separation, on the root section of a swept wing. The employed calculation methods comprise 3D integral methods as well as field methods. A short description of...
report 1981
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Oskam, B. (author)
The viscous flow around multi-component airfoils has been calculated by solving incompressible potential flow and boxindary layer problems iteratively. The potential flow problem is solved by a revised version of the 2D NLR panel method. A model transport equation of turbulent stress is employed to calculate the turbulent boundary layer. The...
report 1980
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Veldman, A.E.P. (author)
In this report a mathematical model is presented which can describe the dynamic behaviour of liquids in partially filled containers under low gravitational conditions. This model will be used for the evaluation of a series of experiments which the NLR has planned to be performed onboard Spacelab. Furthermore, the report contains a description of...
report 1979
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