CFDLAND’s Post

💥 This can be the basis of Computational Fluid Dynamics (CFD). A must-read blog about fundamentals of fluid dynamics

Despite the significance of rough-wall turbulent flows in many engineering applications (e.g. leading-edge erosion of wind turbine blades), we need up-to-date review papers on the topic. However, Kadivar, Tormey, and McGranaghan (2021) give us just that—with more than 500 references spanning 175 years of research, they analyse past and recent flow studies over rough surfaces to improve our general understanding and identify gaps for future research. The paper first describes the classical division of the boundary layer into layers dominated by viscous or turbulent shear stresses and the classification of “smooth” and “rough” flow regimes using the concept of equivalent sand-grain roughness. It then outlines how roughness effects have historically been investigated experimentally and, more recently, numerically with high-resolution computational fluid dynamics (CFD). While our understanding of turbulent flows over rough surfaces is still far from comprehensive, the paper concludes that continual research and modern CFD methods, like DNS, are the pathway to improve our fundamental understanding of rough-wall flows. Get research summaries by email: https://lnkd.in/eDevB8E2   Mohammadreza Kadivar, David Tormey, and Dr. Gerard McGranaghan. 2021. “A Review on Turbulent Flow over Rough Surfaces: Fundamentals and Theories.” International Journal of Thermofluids 10 (May): 100077. https://lnkd.in/dEiSf9Hi. #windenergy #windpower #research #CFD #AndreasBechmann #windturbine #leadingedgeerosion #lercat

⚡Time Dependent CFD Simulation: Vortex Shedding⚡ Vortex shedding is a phenomenon, when the wind blows across a structural member, vortices are shed alternately from one side to the other, and where alternating low-pressure zones are generated on the downwind side of the structure giving rise to a fluctuating force. This phenomenon is of major importance in engineering design because the alternate formation and shedding of vortices also creates alternating forces, which occur more frequently as the velocity of the flow increases. Source: https://bit.ly/3nRj1Jr 📥 Latest newsletter: https://bit.ly/41N6Ixq #cfd #simulation #engineering #science

⚡Time Dependent CFD Simulation: Vortex Shedding⚡ What is Vortex shedding in the first place? Vortex shedding is a phenomenon when the wind blows across a structural member, vortices are shed alternately from one side to the other, and where alternating low-pressure zones are generated on the downwind side of the structure, giving rise to a fluctuating force. This phenomenon is of major importance in engineering design because the alternate formation and shedding of vortices also create alternating forces, which occur more frequently as the velocity of the flow increases. Source: https://bit.ly/3nRj1Jr 📥 Latest newsletter: https://bit.ly/41N6Ixq #engineeredmind #science #technology #engineering #cfd #simulation

🌀The Navier-Stokes equations : compressible vs incompressible 🌀 The incompressible equations can be derived from the compressible NS equations in the limit M → 0 with M = |u|/c the Mach number and where c is the speed of sound in a compressible fluid. ❗ Note: div u =0 is a direct consequence of the energy conservation equation for low Mach numbers. ❌ Attention: I made a mistake in the RHS (Right-Hand Side) of the energy equation; the sign should be the same as in the RHS of the momentum equation (so, should be + in this case). I have an amazing audience who are finding all my mistakes 🙂 #cfd #fluiddynamics #fluidmechanics #cae #hydrodynamics #engineering #hydraulics #mechanicalengineering #aerodynamics

An exploration into rocket combustion stability by engineering CFD simulations

There’s still time to register for the microcredential course, Computational Fluid Dynamics (CFD) for Multiphase Flows! The goal of the course is to guide industrial CFD practitioners in rapidly expanding their capabilities into the multiphase realm. The course is open to anyone — Penn Staters and beyond. Learn more and register today ➡ https://lnkd.in/e5WeT8V8 #PennStateEngineering #STEMCareers #EngineeringJobs #ProfessionalDevelopment #PennStateAlumni #PennStateME

"Excited to share my recent project on modeling and simulating a bubbling fluidized bed reactor" I delved into the complex dynamics of gas-solid interactions within this reactor, gaining valuable insights into its performance and optimization. This project allowed me to apply my skills in Modelling,research and CFD techniques. Key findings include visualization of hydrodynamics and heat transfer in Fluidized bed reactor and to can make sure that there is fairly turbulent flow and investigate bubbling formation. This project open new horizons about multiphase flow and how can we model it obtaining interaction effects between phases and new models that can handle this phenomena. Tip : make video on 0.5X 😅 #CFD #ANSYS #FluidizedBedReactor #ChemicalEngineering #Simulation #Modeling #MechanicalEngineering

💹 Excited to share our latest paper published in the renowned "International Communications in Heat and Mass Transfer"! In this study, we employed innovative vortex generators called V-baffles inside heat exchangers to investigate local and average heat transfer rates within the pipe. CFD simulations were performed in Ansys 2023R1. The main findings are as follows: 🔹 The double-V-baffle creates impinging jets on the wall, enhancing the main vortex flows. 🔹 The double-V-baffle results in a higher Nusselt number (Nu) but significantly lower friction factor (f) compared to the single-V-baffle. 🔹 The double-V-baffle's effectiveness is up to 21% greater than the single-V-baffle. Read the full paper here: https://lnkd.in/dEAyn23N #HeatTransfer #VortexGenerators #Research #HeatExchangers #MechanicalEngineering #CFD

🧪Experimental Flow vs CFD Simulations in a Clean Air System STZ EURO conducted a fascinating study as part of a thesis project. The goal was to investigate the accuracy and correlation between experimentally determined flow conditions and computational fluid dynamics (CFD) simulations within a clean-air system. They developed a specialized experimental setup to analyze and compare the two approaches. This comprehensive study explored the intricate flow patterns, vortex formations, and air circulation dynamics within the clean air system. Visualization techniques, such as smoke wands, allowed for the capture and analysis of complex flow behaviors. The findings from this research project have significant implications for optimizing clean air system designs, improving energy efficiency, and ensuring the highest levels of cleanliness and contamination control in critical environments. #CleanAirSystem #Experiment #NumericalSimulation #CFD #FluidSimulation #Experiment #Measurements #FluidMechanics #Cleanroom #FlowVisualization #AirVortices #Vortex #Flow #Efficiency #Labortory