Chemical Engineering Science’s Post

An exploration into rocket combustion stability by engineering CFD simulations

"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

CFD approach to turbulence: the #CFD (Computational Fluid Dynamics) approach to turbulence involves modeling and simulating turbulent flow phenomena using numerical methods. Turbulence in fluid flow refers to the chaotic, irregular motion characterized by fluctuations in velocity, pressure, and other flow properties. To handle turbulence in CFD simulations, various turbulence models are employed. https://lnkd.in/gqWPQ-sV

If you are working on particle scale CFD simulations or reactor scale simulations, you probably wonder how accurate is to use 'Point particle approach' in the simulations. Then, this latest paper is for you. We have specifically studied about the accuracy of using 'point particle approach' during char gasification. We have compared 'particle resolved approach' vs 'point particle approach'. #PointParticleApproach #ParticleResolvedApproach #ReactingParticles #CharGasification #StefanFlow Authors: Nils Erland Leinebø Haugen, Kentaro Umeki and Thamali Jayawickrama Here is the link for the article:

🦃🍗If you did this CFD simulation, what would be the definition of your success metric 😂 are you measuring Fourier number and Biot number!? 😂 “In the study of heat conduction, the Fourier number is the ratio of time, t, to a characteristic time scale for heat diffusion, t_diff. This dimensionless group is named in honor of J.B.J. Fourier, who formulated the modern understanding of heat conduction. The time scale for diffusion characterizes the time needed for heat to diffuse over a distance, L. For a medium with thermal diffusivity, alpha, this time scale is L^2/alpha, so that the Fourier number is t/td = alpha t / (L^2). The Fourier number is often denoted as Fo or Fo_L” Happy thanksgiving #cfd #thermodynamics #heattransfer #engineering #mechanicalengineering #meme

WEBINAR MODELING COMBUSTION IN LIQUID ROCKET ENGINES June 19, 2024 10:30 AM – 11:30 AM CDT PRESENTED BY: David H. Rowinski, Principal Engineer Convergent Science This webinar will demonstrate how to model liquid rocket combustors with CONVERGE CFD software. We will present several single element combustor test cases spanning a range of conditions from subcritical to supercritical with a variety of common fuel/oxidant combinations, including liquid oxygen with hydrogen, methane, and RP-1. We will discuss the various equation of state options available in CONVERGE as well as the use of detailed chemistry to model the chemical kinetics. Furthermore, we will cover the case setup for a multi-element injector rig, highlighting the portions of the setup that allow us to capture the wide range of phase space accessed in this model. We will demonstrate the effect of the equation of state options and combustion models on the prediction of pressure oscillations in this combustor. https://lnkd.in/d_5S84nK #cfd #PhysicsResearch #Aviation #mechanicalengineering #mechanical #Aeroengineering #engineering  #science #Aerodynamics #DeepCFD #NavierStockes #Mathematical #MathematicalEngineering #GPU #RocketCombustors #FuelOxidant

I love CFD! Ignition of liquid rocket engines is a challenging problem. One of several ignition methods is a torch ignitor, where hot combustion products are injected into a stream of reactants. Failure to ignite or flashback can occur when the flow rates are too low, and if flow is injected too late, pressure surges or detonation waves can destroy a combustor. Here we model torch ignition of a subcritical liquid-oxygen single element liquid rocket combustor with CONVERGE CFD. Detailed chemistry, large eddy simulation, and adaptive mesh refinement are used to efficiently model this complex process. How cool is this? Thanks to David Rowinski for providing this case. 🚀 🔥 #cfd #convergecfd

Meshing challenges in computational fluid dynamics can be daunting, but with the right tools, we can overcome them effectively. I'm curious to hear about the meshing hurdles you face in your CFD simulations. Drop your thoughts below or feel free to reach out for a deeper conversation. #ennova #meshing #cfd #turbomachinery #aerodynamics

🚀 New YouTube CFD Video Alert! 🎥 I just uploaded a new video on YouTube discussing the staggered and collocated grid approaches in computational fluid dynamics (CFD). Whether you're a student, researcher, or professional in the field of fluid dynamics, this video will help you understand the advantages and challenges of each method. 🔍 What you'll learn: Differences between staggered and collocated grids Applications and benefits of each approach 👉 Don't forget to subscribe to my channel for more educational content on CFD and other related topics! 🔄 Share this post with your network if you find it helpful. #CFD #FluidDynamics #ComputationalFluidDynamics #Engineering #Education #YouTube #Subscribe https://lnkd.in/dhM-53pN

Dimples and other flow-interruption features have been used very effectively in various heat transfer surfaces and fluid flow channels decades-ago, prior to CFD. Applications included other fluids, as well as air and other gases, where higher performance was required ...........................