GridPro

The intricate flow dynamics around disk-gap-band (DGB) parachutes reveal a world of complex physics, particularly in re-entry scenarios: - Shock Dynamics: Two shocks form—one near the capsule and one ahead of the canopy—creating a turbulent wake that drives cyclical “breathing” patterns. This results in intense drag fluctuations and stress on the parachute. - Unsteady Interaction: As the capsule wake meets the canopy bow shock, a periodic instability occurs, triggering structural oscillations and temporary parachute collapse and re-inflation, a phenomenon impacting performance and reliability. - Orientation & Medium: Non-axial orientations (e.g., 50-100° pull angles) reduce drag discrepancy. Testing in CO₂ (similar to Mars' atmosphere) shows just a 2% variance in drag vs. air, supporting Earth-based testing as a Mars-proxy. #Mesh #Meshing #NASA #Simulation #CAE #FluidDynamics #StructuredMesh #GridPro #aerospace

The role of CFD is vital in understanding the physics of Gasoline Direct Injection (GDI) Systems. The use of GDI in engines leads to higher efficiency and lower emissions. Read our blog post on how #GridPro aided in simulating a GDI #Nozzle here - http://bit.ly/3YDv4qy #CFD #FluidDynamics #CAE #Mesh #Meshing #OpenFOAM #Combustion

Exploring SITVC for Spacecraft Propulsion This research dives into Secondary Injection Thrust Vector Control (SITVC) for high area-ratio nozzles in spacecraft. With SITVC literature focusing on low area-ratio, atmospheric conditions, this study fills the gap by analyzing SITVC's behavior in a vacuum environment. Key Findings: 1. Vacuum Effects: The study explored how vacuum conditions impact SITVC performance, revealing shifts in nozzle behavior critical for system design. 2. Parameter Optimization: A parametric study of nozzle area-ratio, injector placement, and angle highlighted optimal configurations for efficient thrust vectoring. 3. Real-world Validation: The custom 3D-printed SITVC nozzle and thrust stand allowed experimental validation, comparing SITVC with conventional systems in a vacuum setup. Read More - https://lnkd.in/g7cPjFJw #CFD #GridPro #FluidDynamics #Nozzles #Propulsion #Spacecraft #Mesh #Meshing #Aerospace

This #SimulationFriday, let's look at this study which compares the performance of a #scramjet #engine under standard laboratory conditions and flight conditions, where the engine experiences significant heating loads. The study used a Mach 12 Rectangular-to-Elliptical Shape-Transitioning scramjet #flow path and examined it through three-dimensional and chemically reacting Reynolds-averaged Navier-Stokes (#RANS) solutions. The results showed that while flight conditions promoted rapid mixing, high #combustor temperatures inhibited the completion of reaction pathways, reducing chemical heat release by 16%. However, the heated walls in flight ensured 28% less energy was absorbed by the walls. The study also found that while inlet fuel injection promoted robust burning of combustor-injected fuel, premature #ignition upon the inlet in flight suggests these #injectors should be moved further downstream. The study concludes that the optimal engine design for flight may differ considerably from that which gives the best performance in the tunnel, due to counteracting differences in heat release and loss to the walls. Read here - https://lnkd.in/gCRkRVRS #CFD #GridPro #ComputationalFluidDynamics #FluidDynamics #Simulation #Mesh #Meshing #Combustion #Aerodynamics #CAE

Advancements in Biomedical Computing are transforming research and clinical practice. Techniques like #CFD and #FEM enable critical insights into human physiology, medical device optimization, and disease treatment. From simulating blood flow in arteries to stress analysis of hip implants, numerical methods provide unparalleled understanding. Despite complexities, structured meshes prove superior in accuracy and efficiency for biomedical simulations. Their application in fluid-structure interaction and stress prediction significantly reduces computational efforts, accelerating innovation in #MedicalDevices and #Bioengineering. #BiomedicalEngineering #MedicalSimulation #Biomechanics #MedicalImaging #Analysis #MeshGeneration

What one should realize is that the strength and position of the vortices are directly dependent on the #nacelle, pylon, slat, and main-element #wing #geometries and their installation. Geometric #optimization of these components will tremendously aid in reducing the installation penalties. If the #engine is close to the wing, the nacelle vortices attach themselves to the wing’s upper surface under the influence of the low-pressure zone at the leading edge. This interaction is beneficial as these vortices supply additional #energy to the particles in the boundary layer to resist the adverse pressure gradients and prevent flow separation. In a way, this flow phenomenon mitigates the side effect of nacelle installation by decreasing the loss in the lift. Although the installation vortices are generally favorable since they originate in a zone of low kinetic energy (wing-pylon junction), they tend to have a low axial velocity and as a consequence, they are eventually bound to breakdown and cause flow separation when faced against a high-pressure gradient, especially at higher alphas. To know about the Nacelle Wake Flow Separation, read the GridPro Blog https://bit.ly/3ttN9Zm #CFD #FluidDynamics #mesh #meshing #engineering #aerodynamics #aerospace

Welcome back! In today’s #tutorialtuesday video, we're focusing on Grid Quality Checks via the command line! This is part 2 of our series, following our previous video, "Launch GridPro Grid-Smoother from a Terminal!" YouTube Video - https://lnkd.in/gvd9s9AU #cfd #cae #automation #hpc #meshing #optimization #mesh

GridPro meshes were used to validate a hybrid RANS-LES turbulence model in the injection, mixing and #combustion of a #supersonic ramjet engine. In this study, the effects of numerics, grid resolution and boundary conditions are investigated. This #MeshingMonday have a look at the beautiful mesh for the inclined injector portion. #CFD #CAE #Simulation #Mesh #Meshing #LES

Delving into the intricate dynamics of ship maneuverability, CFD emerges as a crucial ally. In a recent simulation utilizing GridPro grids, fascinating flow details were observed during a rudder angle test at a straight-ahead condition. At a deflection of -35 degrees, the rudder revealed distinct flow separation zones, offering profound insights into its aerodynamic behavior. Through color-coded representations of axial velocity on a horizontal cut plane, the intricate interplay between the propeller disk and the rudder's influence on the flow dynamics was unraveled. The visualization vividly showcases the propeller's axial body force distribution and the pressure distribution along the rudder. Shades of blue delineate regions of heightened axial velocity, while hues of red indicate areas of elevated pressure, offering a comprehensive view of the flow phenomena. Such virtual tests serve as invaluable resources for comprehending ship maneuverability, paving the way for optimized designs and enhanced operational efficiency in maritime environments. #CFD #marine #shipping #decarbonisation #FluidDynamics #innovation #tech #Engineering #Simulation #NavalEngineering #Marine #mechanicalEngineering

The lifespan of a centrifugal pump is significantly influenced by vibrations and noise. The paths through which fluid leaks between the impeller and the housing are crucial to the overall fluid dynamics and acoustic efficiency of a hydraulic pump. As the clearance of the wear ring increases, both the pressure pulsation against the sidewalls and the normal vibration speed on the volute's outer surface tend to decrease. Conversely, the volute's efficiency improves when the clearance is reduced. #CentrifugalPump #CFD #ComputationalFluidDynamics #Mesh #Meshing #TurboMachinery #FluidDynamics #Simulation