Fluid parcel

About: Fluid parcel is a research topic. Over the lifetime, 791 publications have been published within this topic receiving 23689 citations. The topic is also known as: fluid particle & material element of fluid.

Finite element developments for general fluid flows with structural interactions

Abstract: SUMMARY The objective in this paper is to present some developments for the analysis of Navier–Stokes incompressible and compressible fluid flows with structural interactions. The incompressible fluid is discretized with a new solution approach, a flow-condition-based interpolation finite element scheme. The high-speed compressible fluids are solved using standard finite volume methods. The fluids are fully coupled to general structures that can undergo highly non-linear response due to large deformations, inelasticity, contact and temperature. Particular focus is given on the scheme used to couple the fluid media with the structures. The fluids can also be modelled as low-speed compressible or slightly compressible media, which are important models in engineering practice. Some solutions obtained using ADINA are presented to indicate the analyses that can be performed. Copyright 2004 John Wiley & Sons, Ltd. The analysis of multiphysics problems, and specifically the solution of fluid–structure interactions, has been given increased attention during recent years [1]. This is largely because numerical methods have become very powerful and can be used at reasonable costs giving great benefits in scientific and engineering studies. Traditionally, fluid flows have been solved assuming rigid structures, and structures have been solved assuming fluid pressures. Sometimes iterations were used between the analyses of the two media to ensure that reasonable assumptions have been used in each case. However, there are many problems where a direct fully coupled analysis is needed to model the physics of the fluid–structure problem accurately. This is particularly the case when the structure undergoes large deformations in the interaction with the fluid and thermal effects need be included.

Finite Element Computational Fluid Mechanics

Abstract: Finite element analysis as applied to the broad spectrum of computational fluid mechanics is analyzed. The finite element solution methodology is derived, developed, and applied directly to the differential equation systems governing classes of problems in fluid mechanics. The heat conduction equation is used to reveal the essence and elegance of finite element theory, including higher order accuracy and convergence. The algorithm is extended to the pervasive nonlinearity of the Navier-Stokes equations. A specific fluid mechanics problem class is analyzed with an even mix of theory and applications, including turbulence closure and the solution of turbulent flows.