ADINA CFD
Das ADINA CFD Programm bietet modernste Finite Elemente und volumenbasierte Berechnungsverfahren für inkompressible und kompressible Strömungen. Die Strömungen können dabei freie Oberflächen und bewegte Kopplungen zwischen Fluiden sowie zwischen Fluiden und Strukturen enthalten. Hierfür wird eine ALE (arbitrary Langrangian-Eulerian) Formulierung verwendet.
Die in ADINA CFD eingesetzte Methode basiert auf Finite Elemente und Finite Volumen Diskretisierungsverfahren mit einem allgemein gültigen, effizienten Lösungsansatz. Es können allgemeine Strömungsbedingungen in beliebigen Geometrien berechnet werden.
Improved ADINA CFD Sliding Mesh & Glueing Capability
The sliding mesh and glueing capability of ADINA CFD is improved in version 8.5. It can now be applied to couple subdomains where the sliding mesh surfaces have totally different lengths and finite element discretizations. The capability is also available to model conditions between solid elements and fluid ....
Solving Unsteady Separated Flow Using Large Eddy Simulation in ADINA CFD
Sufficiently accurate and efficient turbulence modeling is obviously most important in CFD. While Large Eddy Simulation (LES) is regarded as very accurate, the computational cost is known to be very high. Hence, LES is, for now, hardly used for complex industrial geometries (see for example Spalart, 2000, reference given below).However, as computational power
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10 Million DOF CFD Solutions on a Laptop
The performance of our algebraic multi-grid solver in CFD has significantly improved the ADINA for large industrial CFD problems. ....
Analysis of a Rising Air Bubble
The VOF surface-capturing method, available in ADINA 8.1, can be used to study the motion of bubbles due to buoyant and interfacial forces. The animation above shows the ascension of an air bubble in oil. Both the air and the oil are modeled as incompressible Newtonian fluids. The model is two-dimensional. The initial shape of the bubble is a 3 mm square. The oil container is 10 mm in width and 40 mm in height. ....
Artificial Lung Analysis
The animation shows how a bolus of particles injected at the fluid inlet of the artificial lung progresses into the lung, through the fiber bundle and out the fluid outlet. ADINA-F is used to compute the steady fluid flow through the artificial lung, and ADINA-PLOT is used to compute the particle traces and create ....
Blood Vessel Simulation
The animation shows the three stages of the artery simulation: stretching, uniform blood pressure rise, and several pressure cycles. The results show the severe pressure drop across the stenosis and the high axial strain in the artery. The units used in the simulation are dyne, cm, and second. ....
Multiphysics Flow in Porous Media
Flow and solute transport in porous media is of interest in many practical applications. It can represent the spread of a pollutant (e.g. chemical waste) through ground water flow, salt water incursion in an aquifer, and even the spread of nuclear waste through ground water. ....
The Multiple Reference Frame Feature in ADINA CFD
In this example, we solve a CFD problem using the new Multiple Reference Frame feature available in ADINA. Fluid flows through a 3-dimensional channel with two impellers rotating at different frequencies (?2/?1=6). A normal traction is applied at the inlet, and a mass ratio loading is applied at the lower half of the inlet. The mesh used, which remains stationary during the simulation, is shown in the next figure, followed by the pressure plot calculated at the central cross-sectional plane. The above animation shows the mass transfer in the same plane. ....
New Turbulence Model in ADINA for CFD
The solution of a well-known problem for turbulence benchmarking, namely, the "wall mounted Glauert-Goldschmied body". The analysis model consists of a two-dimensional duct, partially obstructed by a hump, see figure below. We use the experimental data from the NASA Langley Research Center to compare against our numerical results. This problem has proven to be quite demanding, especially in the prediction of pressure recovery and separation behind the hump. ....