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convergecfd
Добавлен 26 янв 2008
Simulating Combustion in a Solid Rocket Motor Using CONVERGE
Unlike liquid rockets, solid rockets have fewer moving parts, reducing the risk of mechanical failure and allowing them to be stored for long periods and launched quickly when needed. Understanding the combustion characteristics, including the burning rates, temperature profiles, and pressure distributions across the propellant surface, is crucial for optimizing their performance. However, modeling these phenomena requires accurate capture of multiple components, such as supersonic flow, rapid chemical reactions under high pressures, and complex grain geometry. In this video, we use the CONVERGE CFD solver to analyze the internal flow in a Naval Air Weapon Command (NAWC) Motor 13 rocket u...
Просмотров: 106
Видео
Simulating Hydrogen Storage Tank Defueling With CONVERGE
Просмотров 10016 часов назад
Compared to traditional hydrocarbon fuels, hydrogen presents unique challenges for storage due to its small size, low density, and highly combustible and corrosive nature. Adapting our infrastructure to enable fast, easy, and safe fueling/defueling of hydrogen-powered vehicles requires extensive experimentation and testing. CFD can help accelerate this testing process and reduce associated cost...
WEBINAR | Solving Challenges in Hydrogen Safety and Storage With CFD
Просмотров 8316 часов назад
Hydrogen has the potential to help address issues related to energy security while reducing carbon emissions and promoting sustainability across many industrial sectors. To ensure a reliable supply chain, solutions must be developed for secure storage and transport of hydrogen from production facilities to consumers. Computational fluid dynamics (CFD) plays a vital role in helping engineers ret...
WEBINAR | Developing Chemical Kinetic Mechanisms in the Computational Chemistry Consortium
Просмотров 221Месяц назад
Presented by: Henry Curran, Technical Director, Computational Chemistry Consortium Pradeep Sapkota, Senior Research Engineer, Convergent Science With ever-tightening emissions regulations and growing interest in alternative fuels, demand is increasing for accurate kinetic models of surrogate components to predict the combustion and emissions of real fuels. The Computational Chemistry Consortium...
Simulating the Cabra Hydrogen Burner With CONVERGE
Просмотров 240Месяц назад
Cabra-type flames are widely used for model development as they offer simple flow configurations with well-defined boundary conditions. In this case, we simulated a Cabra hydrogen flame with varying coflow temperatures to study the changes in flame lift-off lengths using large eddy simulations (LES). We used CONVERGE's SAGE detailed chemistry solver to accurately capture hydrogen combustion in ...
WEBINAR | Modeling Multi-Phase Flows in Positive-Displacement Compressors
Просмотров 129Месяц назад
This webinar focuses on using CONVERGE CFD software to model liquid-flooded positive-displacement compressors. We discuss how to model an oil-injected screw compressor and an oil-injected rotary vane compressor and present validation for both cases. We highlight some of the new multi-phase models in CONVERGE 4 used in these simulations, including front capturing methods for compressible volume ...
WEBINAR | Development of a Dedicated Hydrogen Combustion System for Heavy-Duty Applications
Просмотров 364Месяц назад
PRESENTED BY: Vincent Giuffrida, CFD Engineer, IFP Energies nouvelles Olivier Colin, Research Engineer, IFP Energies nouvelles In this webinar, our collaborators at IFP Energies nouvelles describe how they used CONVERGE to define the specifications of a dedicated hydrogen direct-injection combustion system for a heavy-duty application to maximize fuel efficiency and lower raw NOx emissions. The...
Simulating the Sandia Hydrogen DI Engine Using LESI Spark Model
Просмотров 1862 месяца назад
With the global push toward sustainability, hydrogen-powered internal combustion engines are gaining popularity over traditional fossil fuel engines due to their enhanced energy efficiency and reduced carbon emissions. Modeling hydrogen engines can help us understand fuel injection and spark ignition details, enhance combustion and fuel efficiency, as well as meet emissions regulations. This si...
Simulating a Variable Geometry Turbocharger with CONVERGE
Просмотров 2712 месяца назад
With autonomous meshing, CONVERGE can easily accommodate moving geometries without sacrificing accuracy. In this video, we simulated a variable geometry turbocharger using autonomous meshing and RANS turbulence modeling. In the first view, you can see the flow through the device (streamlines are colored by velocity) when the vanes are in a closed position. The second view shows a cut-plane of t...
Modeling Combustion in Liquid Rocket Engines
Просмотров 1 тыс.2 месяца назад
In this webinar, we demonstrate how to model liquid rocket combustors with CONVERGE CFD software. We 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 discuss the various equation of state options available in CONVERG...
WEBINAR | From CT to CFD: Biomedical Simulations With Moving Geometries
Просмотров 3833 месяца назад
PRESENTED BY: Kerim Genc, Product Manager, Synopsys Tristan Burton, Director of New Applications, Convergent Science Tejas Patel, Research Engineer, Convergent Science In the biomedical field, computational fluid dynamics (CFD) simulations are a low-cost, non-invasive method to gain insight into key physiological processes and to evaluate the efficacy of medical devices and interventions. In th...
CONVERGE Tutorial Series: Hydrogen Direct-Injection Engine Case Setup
Просмотров 5103 месяца назад
This tutorial provides step-by-step instructions on how to set up a hydrogen direct-injection engine case in CONVERGE. Tutorial Contents: 0:00 Introduction 1:05 Import your geometry 1:44 Flag your boundaries 7:40 Begin case setup 8:50 Case Setup: Application Type 11:25 Case Setup: Materials 15:12 Case Setup: Simulation Parameters 20:29 Case Setup: Boundary Conditions 39:56 Case Setup: Initial C...
WEBINAR | Using Machine Learning to Optimize the Mixture of a Hydrogen IC Engine
Просмотров 6363 месяца назад
PRESENTED BY: Alen Jose, Specialist Engineer, Volvo Group Trucks Technology Mukul Biware, Sr. Research Engineer, Convergent Science Dan Probst, Sr. Principal Engineer, Convergent Science Hydrogen internal combustion engines (H2ICEs) have sparked global interest as a potential solution to reduce carbon emissions from transportation. Research and development efforts are underway around the world ...
Simulating Hydrogen Combustion in the Sandia DI Engine
Просмотров 6503 месяца назад
Hydrogen-powered internal combustion engines offer significant advantages over conventional fossil fuel engines, including reduced carbon emissions and high energy efficiency. Simulating hydrogen engines can help us enhance the engine performance, understand fuel injection and ignition strategies, as well as assess emissions and combustion characteristics. This video shows a simulation of high-...
WEBINAR | The Role of CFD in Developing Oil & Gas and Offshore Technologies
Просмотров 4723 месяца назад
WEBINAR | The Role of CFD in Developing Oil & Gas and Offshore Technologies
Simulating Flow Through a Tubing Pump With CONVERGE
Просмотров 1744 месяца назад
Simulating Flow Through a Tubing Pump With CONVERGE
WEBINAR | Advancing Rotating Detonation Engines Using CFD
Просмотров 8364 месяца назад
WEBINAR | Advancing Rotating Detonation Engines Using CFD
Simulating an Oil-Cooled Electric Motor Using a Multiple Reference Frame Approach
Просмотров 4954 месяца назад
Simulating an Oil-Cooled Electric Motor Using a Multiple Reference Frame Approach
Simulating a Drone Extinguishing a Pool Fire Using CONVERGE
Просмотров 5144 месяца назад
Simulating a Drone Extinguishing a Pool Fire Using CONVERGE
Webinar | Drone Simulations for Urban Air Mobility
Просмотров 3464 месяца назад
Webinar | Drone Simulations for Urban Air Mobility
Formula 1 Race Car Aerodynamics: Simulation in CONVERGE
Просмотров 3515 месяцев назад
Formula 1 Race Car Aerodynamics: Simulation in CONVERGE
Simulating Quadcopter Takeoff Under Different Wind Conditions
Просмотров 2575 месяцев назад
Simulating Quadcopter Takeoff Under Different Wind Conditions
Simulating a Supercritical Hydrogen-Oxygen Rocket Combustor With CONVERGE
Просмотров 6335 месяцев назад
Simulating a Supercritical Hydrogen-Oxygen Rocket Combustor With CONVERGE
WEBINAR | Enabling 3D Coupled Battery Simulations With CONVERGE CFD Software
Просмотров 5955 месяцев назад
WEBINAR | Enabling 3D Coupled Battery Simulations With CONVERGE CFD Software
Simulating the Effect of Yaw on Floating Offshore Wind Turbines
Просмотров 2866 месяцев назад
Simulating the Effect of Yaw on Floating Offshore Wind Turbines
WEBINAR | Development of an Aero-Servo-Elastic Module for the Next Generation of Wind Turbines
Просмотров 1706 месяцев назад
WEBINAR | Development of an Aero-Servo-Elastic Module for the Next Generation of Wind Turbines
Simulating a Floating Offshore Wind Turbine
Просмотров 3447 месяцев назад
Simulating a Floating Offshore Wind Turbine
WEBINAR | CONVERGE for Hydrogen Combustion Modeling: Transportation, Aerospace & Safety
Просмотров 1,1 тыс.7 месяцев назад
WEBINAR | CONVERGE for Hydrogen Combustion Modeling: Transportation, Aerospace & Safety
Simulating the PSU Hydrogen-Oxygen Research Combustor With CONVERGE
Просмотров 2447 месяцев назад
Simulating the PSU Hydrogen-Oxygen Research Combustor With CONVERGE
Simulating an Offshore Capping Stack Using CONVERGE
Просмотров 2088 месяцев назад
Simulating an Offshore Capping Stack Using CONVERGE
pionowe mają sens tylko z osłonami płatów powracających - tyle że to rozwiązanie jest nastawione już tylko na jeden kierunek wiatru
What are the meanings of those colors, pressure or velocity?
Thanks for your question! The colors represent different parameters in different simulations in this webinar-is there a specific simulation that you’re wondering about?
Is this program free I didn't see price on page 😮
Thanks for your question! We have both free and paid licensing options, depending on your intended use of the software. If you’re interested in learning more, please reach out to us through the following form-we’d be happy to talk through our different licensing options to find the one that’s best for your needs: convergecfd.com/about/contact-us
How do we prevent blowoffs?
Please make videos like this for all example cases so we can practice these ourselves using such guide videos
I have been working on same projects of (Multi point Lean Direct Injection) MPLDI-1,2, 3 combustors. Did you face problem in calculation of EICO values?
Thanks for your question! There are methods available that can help predict CO emissions more accurately. Our Support team would be happy to discuss these methods with you-please feel free to reach out to us with your question through our contact form: convergecfd.com/about/contact-us
What's the reasons if flashback. How to overcome it
Hi Shamoon, flashback occurs when the jet momentum is not sufficient to stop the flame from propagating upstream and the fuel-air ratio is in the flammability range/the temperature is sufficiently high. Determining how to prevent flashback is a current area of research, but one potential way is to increase the jet momentum so that the flame is unable to propagate upstream. Tools like CFD can help engineers understand what operating conditions to employ to prevent flashback.
Any example of hydrogen in diesel engine?
What is the percentage of hydrogen in the combustion chamber?
Very informative.
Hi, do you have a step-by-step tutorial in making the simulation?
yes please! it would be very useful, we are trying to research about RDE
Thanks for your question! Please reach out to us through our contact form, and our support engineers can discuss the materials we have available for RDE modeling: convergecfd.com/about/contact-us
Where is the sound?
Can u share this geometry ?
Convergecfd- Yo- you did interesting . 😲
i am new to CFD , i want to use the Converge. i want to know if it can be used to also simulate cases of water in pipelines
Hi Asiedu, thanks for your question! CONVERGE is able to simulate water in pipelines, but we’d like to learn more about the modeling requirements for your specific case. Please fill out this contact form so we can discuss further: convergecfd.com/about/contact-us
Could you explain step by step how to do this simulation?
The reversion that happens just as the intake valve opens is interesting to see.
Were can i find a liquid. dat for liquid ammonia
#!CONVERGE_VERSION=4 ##!Exported by CONVERGE Studio v4.0.0 Mar 08 2024 04:17:25 #======================= NH3 molecular_weight 17.031 ! PowerIdx ConsistentIdx YieldStress(N/m2) SolidViscosity(Pa-s) HERSCHEL_BULKLEY_MODEL 1 1 1 1 ! RefPressure[Pa] RefDensity[kg/m3] BulkModulus[Pa] Compressible 101325 598.87 1.9e+09 ! CriticalTemp[K] Critical_temp 405.65 !Temperature Viscosity Surf tension Heat of Vapo Vapor pres Conductivity Density Specific heat ! [K] [N*s/m^2] [N/m] [J/kg] [Pa] [W/(m*K)] [kg/m^3] [J/(kg*K)] 0 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 10 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 20 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 30 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 40 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 50 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 60 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 70 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 80 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 90 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 100 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 110 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 120 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 130 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 140 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 150 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 160 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 170 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 180 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 190 0.000572593 0.0456971 1.45714e+06 6119.73 0.65812 734.256 4518.86 200 0.00051074 0.0444868 1.44548e+06 8752.93 0.65812 728.998 4536.04 210 0.000416429 0.0418703 1.41949e+06 17936.9 0.65812 717.383 4552.13 220 0.000348842 0.0392826 1.39264e+06 34110.6 0.65812 705.534 4549.85 230 0.000298529 0.0367248 1.36485e+06 60853.6 0.63528 693.428 4536.38 240 0.000259749 0.0341982 1.33604e+06 102760 0.61244 681.043 4518.89 250 0.000228876 0.0317045 1.3061e+06 165472 0.5896 668.349 4504.56 260 0.000203543 0.0292451 1.27491e+06 255682 0.56676 655.315 4500.57 270 0.00018217 0.0268219 1.24232e+06 381089 0.54392 641.901 4514.09 280 0.000163679 0.024437 1.20817e+06 550346 0.52108 628.062 4552.3 290 0.000147325 0.0220929 1.17224e+06 772999 0.49824 613.739 4622.39 300 0.000132597 0.0197921 1.13428e+06 1.05942e+06 0.4754 598.865 4731.51 310 0.000119142 0.017538 1.09396e+06 1.42076e+06 0.45256 583.352 4886.86 320 0.000106724 0.0153343 1.05086e+06 1.86894e+06 0.42972 567.088 5095.61 330 9.51896e-05 0.0131856 1.00443e+06 2.41658e+06 0.40688 549.924 5364.93 340 8.44452e-05 0.0110975 953908 3.0771e+06 0.38404 531.66 5702 350 7.44389e-05 0.00907721 898219 3.86469e+06 0.3612 512.009 6114.01 360 6.51467e-05 0.00713423 835737 4.79442e+06 0.33836 490.538 6608.12 370 5.65615e-05 0.00528167 763805 5.88231e+06 0.31552 466.545 7191.51 380 4.86842e-05 0.0035393 677549 7.14545e+06 0.29268 438.739 7871.37 390 4.15171e-05 0.00194087 566026 8.60212e+06 0.26984 404.227 8249.71 400 3.5059e-05 0.000562287 390642 1.0272e+07 0.247 352.766 8249.71 410 3.15213e-05 0 0 1.13176e+07 0.247 236.89 8249.71
how was the animation rendering done ?
Hi Michael, thanks for your question! The animation was created in ParaView and shows a cut-plane along one of the pre-chamber nozzle axes, which is used to visualize two different fields: (1) The energy released (chem_src variable in CONVERGE) by the fuel is depicted using a color map that transitions from black to white, and (2) the amount of mixture released (a user-defined passive variable in CONVERGE) from the prechamber to the main chamber is illustrated using a color map that transitions from blue to red, owing to the pressure difference between the prechamber and the main chamber.
@@convergecfd Thanks
Where can i find a chemkin file for liquid ammonia
Where can i find a chemkin file for liquid ammonia
Where can i find a chemkin file for liquid ammonia
I am a student from Algeria, can I get Converge 3.0 for free....
Thanks for your question! For information on obtaining a CONVERGE license for free, visit this webpage: convergecfd.com/products/converge-explore-program
Is there any complete video tutorial of it
Where is the leak located?
Now show the balloon popping :)
I am trying to set up a similar case. Can you please help me with what is the wall y+ here on the centerbody?
simple question ... has no one ever thought to add a free turbine and connect it to a fan at the rear, that would improve the performance of these power plants or at least the economics
pls trainin case setup of wankel engine
One gotta be careful…that middle whirlwind can compress itself.
thank you.
amazing amazing ❤
Is there any available tutorial or documentation for this simulation?
Thank you for your interest in this simulation! To request more information about this case, please fill out the contact form on our website: convergecfd.com/about/contact-us
This is a very interesting simulation. I am currently studying DDT simulations. Could you provide a tutorial to help me learn? Thank you very much.
Thank you for your interest in this simulation! To request more information about this case, please fill out the contact form on our website: convergecfd.com/about/contact-us
can i get the case setup?
Thank you for your interest in this simulation! To request more information about this case, please fill out the contact form on our website: convergecfd.com/about/contact-us
Can u upload full step by step video
Thank you for your interest in this simulation! To request more information about this case, please fill out the contact form on our website: convergecfd.com/about/contact-us
Is there any reference paper to validate the results from simulation for hydrogen engine
Hi Rohit, thanks for your question! You can check out our recent publication in which we validate a hydrogen engine model against experimental data: doi.org/10.4271/2023-24-0062. If you have any further questions, please feel free to reach out to us directly through our website: convergecfd.com/about/contact-us.
Amazing
impressive!🎉 how does this modeling approach comparing to MRF regarding accuracy and turn around time?
Thanks for your question! The accuracy of the actuator line model (ALM) approach depends on the quality of the CD-CL tables used to obtain the corresponding lift and drag forces. Given high-quality CD-CL tables, ALM can be as accurate as MRF, especially for overall performance parameters such as thrust and torque. ALM is also less sensitive to grid resolution than MRF, and the computational cost of ALM is much lower because it doesn’t resolve the blades. With ALM, we can have a significantly lower total cell count and use larger time-steps. For this case, the ALM approach is approximately 150 times faster than the MRF approach.
Hi, Thanks for your great simulation. How do you find hydraulic diameter and sphericity for calculating inertial and viscous resistance in porous media?
what is this ancient fugorg machinery
Did you float the combustion cambered foam…
Great
Beautiful simulation: Could you tell how the size of the tower (diameter) afets the vertical speed of the flow? Thanks in advance
Hi @jesusaresosalinas9557, thanks for your question! For this study, we were investigating the flow dynamics for a specific tower diameter, so we did not explore how different diameters affect the flow velocity. However, CONVERGE’s autonomous meshing would make it simple to conduct a study comparing tower diameters. If you’re interested in learning more, please feel free to reach out to us: convergecfd.com/about/contact-us
...How to achieve these simulations ???
Great ! but HOW?
Hi Noureddine, thanks for your question! If you’re interested in learning how to run these kinds of simulations in CONVERGE, we recommend attending our free training course CONVERGE for Battery Systems. You can find the schedule for upcoming CONVERGE training courses on our website: convergecfd.com/training
Are there any case study examples for this simulation? It seems that Converge lacks examples compared to other CFDs...
Hi Noureddine, thanks for your question! Please send us a message through our contact form, and we’ll be happy to provide more information on the example cases covered in this webinar and on CONVERGE’s capabilities for modeling oil & gas applications in general: convergecfd.com/about/contact-us
Is it possible to simulate blowing of hydrogen from cylinder in converge?
ха ха... работает криво. В фазе выпуска показывает неверное направление газов.
Can you guide how to simulate floating wind turbine in Converge CFD?