Computational Fluid Dynamics (CFD) is increasingly used to study a wide variety of complex Environmental Fluid Mechanics (EFM) processes, such as water flow and turbulent mixing of contaminants in rivers and estuaries and wind flow and air pollution dispersion in urban areas. However, the accuracy and reliability of CFD modeling and the correct use of CFD results can easily be compromised. In 2...

1. Abstract Nowadays, the use of computational fluid dynamics (CFD) in the design of valves is very common. Despite the continuing growth of computing capability, the computational cost of complex three-dimensional CFD analysis of butterfly valve maintains high, therefore, the CFD analysis-based optimization becomes more time-consuming and computational expensive. In this paper, a comparative s...

Increasing energy costs and power densities in Information Technology (IT) spaces are driving up operational expenses (OpEx) and causing many facilities to run out of capacity much sooner than anticipated. To control OpEx and avoid the capital expenditure (CapEx) required to build new facilities, IT space operators are looking for ways to improve energy efficiency through optimal thermal manage...

Background: Arteriography has been considered the “Gold Standard” for the investigation of Peripheral arterial occlusive disease (PAOD). The development of Colour flow Doppler (CFD) has extended the scope of non-invasive assessment of chronic lower limb arterial disease. Aims: To evaluate and correlate the findings of CFD with arteriography as the gold standard, in PAOD of the lower extremities...

Data are related to the numerical simulation performed in the study entitled "CFD modeling to evaluate the thermal performances of window frames in accordance with the ISO 10077" (Malvoni et al., 2016) [1]. The paper focuses on the results from a two-dimensional numerical analysis for ten frame sections suggested by the ISO 10077-2 and performed using GAMBIT 2.2 and ANSYS FLUENT 14.5 CFD code. ...

Sensitivity analysis is a research area of increasing interest within CFD. Recent developments in Automatic Differentiation software (AD) make the discrete adjoint methods particularly attractive. We outline the theory of adjoint sensitivities and discuss how to use AD to derive adjoint versions from CFD codes. In particular we review the properties of the four major AD packages, we explain how...

The fluid dynamics of the Thoratec HeartMate III (Thoratec Corp., Pleasanton, CA, U.S.A.) left ventricular assist device are analyzed over a range of physiological operating conditions. The HeartMate III is a centrifugal flow pump with a magnetically suspended rotor. The complete pump was analyzed using computational fluid dynamics (CFD) analysis and experimental particle imaging flow visualiza...

Though researchers in computer graphics have started to use the GPGPU (General Purposed Graphics Processing Unit) method to speed up their procedural programs, these techniques are seldom used in the building simulation field. It is possible to apply the GPGPU method to many simulation scenarios (i.e. human evacuation, shadow simulation) to speed up performance. In this paper, CFD is used as an...

System identification is used to develop an accurate and computationally efficient discrete-time aerodynamic model of a three-dimensional, unsteady CFD solution. This aerodynamic model is then used in place of the unsteady CFD solution in a coupled aeroelastic analysis resulting in a substantial savings in computational time. The methodology has the advantage of producing an explicit mathematic...

The first version of an anatomy editing/surgical planning tool targeting anatomical complexity and patient-specific computational fluid dynamics (CFD) analysis is presented. Novel shape editing concepts and human-shape interaction (HSI) technologies have been combined to facilitate interactive shape alterations and grid generation. At a surgery planning phase, these tools are applied to design ...