Modern Computational Fluid Dynamics Research Articles

Computational Simulation of Accumulation of Expired Air in the Infant Cot

Accumulation and re-breathing of CO 2 in expired air has been suggested as one possible explanation for the strong association between prone sleeping position and sudden infant death syndrome (SIDS). This preliminary study applying a modern computational fluid dynamics (CFD) program to simulate the aerodynamics in an infant cot supports the idea that accumulation of expired air may occur in the prone position. The literature dealing with the potential association between re-breathing of accumulated CO 2 and SIDS is briefly reviewed.

Application of computational fluid dynamics to solar thermal receiver/reactor modelling

Modern Computational Fluid Dynamics Software (CFDS) is capable of integrating conductive, convective and radiative heat transfer into one single model. The CFD-Software CFX was successfully applied to model a receiver/reactor for high-temperature liquid-phase processes. The special characteristics of the concentrated solar flux as well as spectral dependent material properties have been implemented into the simulation. Experimental and modelling work should be regarded as complementary. Experiments are needed for validation and the simulations help to interpret the test results and extrapolate to different scales, geometries and material properties.

Use of Analytical Flow Sensitivities in Static Aeroelasticity

Modern computational fluid dynamics tools can be used to predict sensitivities for flows encountered by aircraft and missiles throughout the flight regime. In this study, we describe one important multidisciplinary application of aerodynamic sensitivity analysis, namely, the coupling of the aerodynamic sensitivities with a structural dynamics analysis and optimization code

Stimulating Simulating

AbstractThe difficulties associated with numerical simulation of accretion discs are outlined along with a potential treatment, FLAME. This technique bridges the gap between existing finite difference codes and particle methods in modern computational fluid dynamics (CFD).

Aerodynamic anomalies - Can CFD prevent or correct them?

Computational fluid dynamics (CFD) has become a standard design tool for modern sophisticated aircraft. This paper reviews design methods that were used for some existing jet transport aircraft at a time when theoretical tools had very limited capability. Early designers combined available theory and empirical data with sufficient skill to develop highly successful aircraft. They also overcome serious problems that sometimes arose only after first flight, problems due to aerodynamic phenomena that were not predicted. Some of these problems are discussed in detail in this paper. The questions of whether modern CFD would have warned of these problems and provided necessary solutions is addressed. It is concluded that, in many cases, the answer is negative. Comparisons between two-dimensional CFD airfoil compressibility drag rise, converted to finite wing drag rise using simple sweep theory, and flight test results show good agreement. A rapid method of compressibili ty drag rise prediction based On two-dimensional CFD results is suggested. The method will define the drag that can be expected if wing designers do a proper job, thereby allowing early performance prediction. Actual wing design is a task for three-dimensional wing and body CFD code including viscous and shock wave effects.