CFD-10. Diffuser. Influence of inlet conditions.
This post on Computational Fluid Dynamics (CFD) continues the series of posts dedicated to the CFD simulation of scenarios where turbulence plays a fundamental role. In this case, we discuss the importance of defining flow inlet conditions that accurately represent reality. We work again with a practically two-dimensional domain as the device has a clear […]
CFD-15. Scale-Adaptive Simulation Model
With this entry on Computational Fluid Dynamics (CFD) we finish the series of cases related to turbulence modelling. In this example we will deal with the SAS (Scale-Adaptive Simulation) method that solves turbulent structures by adapting the resolution scale to the mesh size and time step used. In this way, a solution similar to that […]
CFD-14. Flow transition with hybrid turbulence models.
In this new entry on Computational Fluid Dynamics (CFD) we will study an advanced turbulence model that combines the ideas of the hybrid LES-RANS model with the ability to represent laminar-turbulent transition effects. We will perform a study with an unsteady transition flow around a cylinder. The steps to follow can be found in the […]
CFD-13. LES-RANS Hybrid Turbulence Models
In this entry on Computational Fluid Dynamics (CFD) we continue analysing case studies where turbulence plays a fundamental role. In particular, we will see a comparison of results between a usual RANS model and a hybrid LES-RANS turbulence model. The study model, which can be seen meshed in the following image, has a section change […]
CFD-12. LES simulation. Addition of Artificial Turbulence.
In this new post on Computational Fluid Dynamics (CFD) we will see a simple CFD simulation case using a LES (Large Eddy Simulation) turbulence model. This will allow us to see the eddies and instabilities of turbulent flow in a pipe. In order to observe this phenomenon we will include some artificial turbulence in the […]
CFD-11. External Aerodynamics. Flow with Transition.
In this post on Computational Fluid Dynamics (CFD) we will deal with an example of external aerodynamics where it is essential to capture the regime transition effects well. This case requires a special turbulence modelling since in most CFD simulations it is possible to work considering that the flow is at all times only laminar […]
CFD-09. Curved channel flow. SST turbulence model.
In this post on Computational Fluid Dynamics (CFD) we begin a series of posts dedicated to studies where flow turbulence plays a fundamental role. In this first example we study the flow through a curved channel, where the SST (Shear Stress Transport) turbulence model may be applied. As shown in the picture, we will use […]
CFD-08. CFD Aerodynamics. Compressible flow.
In this new entry on Computational Fluid Dynamics (CFD) we are going to simulate the external aerodynamics of a NACA 0012 airfoil. For this study we will also use Acusolve with Hypermesh and Hyperworks CFD preprocessors. In this field of CFD studies, Acusolve has a particularly extensive documentation and validation. The geometry of the profile […]
CFD-07. Turbulence Grid. Optimisation.
In this entry on Computational Fluid Dynamics (CFD) we are going to study a cylinder system common in flow conditioning. This example shows how the geometry of a device could be optimised to achieve a flow with the necessary properties for certain processes. For this study we will use Acusolve software with Hyperworks CFD as […]
CFD-06. Inverted flow. Turbulence model.
In this post on Computational Fluid Dynamics (CFD) we are going to perform a common benchmark of CFD analysis, the study of inverted flow after a step. It reflects the importance of choosing the right turbulence model in CFD simulations. We will use the Acusolve software with the Hyperworks CFD pre-processor. This study also has […]
CFD-05. Processor cooling. Boundary layer.
We continue with the posts related to Computational Fluid Dynamics (CFD). In this case we are going to carry out a benchmark of a common example in thermal analysis using CFD, the study of the cooling of a processor. We will use Acusolve with the pre-processor Hyperworks CFD. The case study can be seen in […]
CFD-03. Vortex shedding. Transient Analysis.
In this third post related to Computational Fluid Dynamics (CFD) we will look at a classic example of transient analysis: vortex shedding in the wake of a cylinder. We will again use Acusolve solver with its pre-processor, Hyperworks CFD. We are going to study the flow around a cylinder with a Reynolds number close to […]
