CFD Analysis of a Lead-Cooled Nuclear Reactor
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Күн бұрынA brief showcase of Case Study C: 'Reactor Scale CFD for Decay Heat Removal in a Lead-cooled Fast Reactor', from the Nuclear Thermal Hydraulics Project, which is funded by the UK government Department for Business, Energy and Industrial Strategy (BEIS). The report can be found here:
www.imeche.org/industry-secto...
Timestamps
0:00 Introduction
7:06 How the reactor works
18:36 Loss of electrical power
29:35 Modelling the reactor
46:57 Meshing
56:08 Results
01:05:36 Outro
#nuclearReactor #gen4 #fluidmechanics101
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Disclaimer
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The methods, algorithms, equations, formulae, diagrams and explanations in this talk are for educational and demonstrative purposes only. They should never be used to analyse, design, accredit or validate real scientific / engineering / mathematical structures and flow systems. For such applications, appropriate trained, qualified and accredited (SQEP) engineers / scientists should be consulted along with the appropriate documentation, procedures and engineering standards. Furthermore, the information contained within this talk has not been verified, peer reviewed or checked in any way and is likely to contain several errors. It is therefore not appropriate to use this talk itself (or any of the algorithms, equations, formulae, diagrams and explanations contained within this talk) as an academic or technical reference. The reader should consult the original references and follow the verification and validation processes adopted by your company / institution when carrying out engineering calculations and analyses. Fluid Mechanics 101 and Dr. Aidan Wimshurst are not accountable or liable in any form for the use or misuse of the information contained in this talk beyond the specific educational and demonstrative purposes for which it was intended.
@user-gf4bi3xn4y Жыл бұрын
From a nuclear and aerospace CFD engineer, excellent video
@prestonjerry366 Жыл бұрын
As an engineer in the nuclear industry, I say your workflow and multi-phase simulation methods are of Industry standards. Great Job !!!
@fluidmechanics101 Жыл бұрын
Thank you 😊
@marianodeanquin Жыл бұрын
Todo muy lindo, pero, que hacemos con lo residuos nucleares, ???? great challenge???
@hardiksharda9673 2 жыл бұрын
This kind of case studies might help beginners understand the in and out of a CFD case set up, results interpretation etc. Thank you Dr. Aidan.
@murillonetoo 2 жыл бұрын
Great talk, Aidan! This kind of case study is quite illustrative for understanding real world applications of CFD. I'm looking forward to watching the next ones!
@sergniko 2 жыл бұрын
I found this talk very useful and extremly interesting! And I want more of these! :) Thanks for you work!
@98pedroneto 2 жыл бұрын
Loved this new concept, probably one of my favourite videos in the channel. I would like however to see some of the more important details that were not mentioned before moving on to the next case. Good work and as always thank you.
@shahedmarleen8757 2 жыл бұрын
Great work, mate. Trying to learn CFD from a developing country. Your videos are so helpful for people like us. Bravo.
@WhiteWallsRU 2 жыл бұрын
Thank you very much for the work. It is perfect and I enjoyed it every moment.
@Restless_Traveler 2 жыл бұрын
Love your content. Keep doing the great work.
@Notaustieg 2 жыл бұрын
really enjoyed it and learn alot. I had a semester thermic simulation in university. we worked with easy problems like a glass of soda partly in water and the sun is burning from above. Its really fascinating what you can use this for and which amazing engineering you can simulate.
@shadowtrace8700 2 жыл бұрын
Great talk, the teacher which is expertise in CFD, also the knowledge about nuclear engineering is correct, very clear for me, thanks!
@alexfells 2 жыл бұрын
Enjoyed that and would enjoy the other case studies. Did print out of of the other case studies after the webinar fn did but haven't gone through it it. Your videos are much more digestable!
@fluidmechanics101 2 жыл бұрын
That's so good to hear! Thank you
@SoumilSahu 2 жыл бұрын
This is amazing! Thanks for sharing!
@vsjhade 2 жыл бұрын
Very informative video...and material shared is great for in-depth reference.
@mlndz111 2 жыл бұрын
Great video and extremely topical.
@SusanBrown11704 2 жыл бұрын
This is so helpful! I’d love a more in-depth look at the process.
@fredjones554 2 ай бұрын
Nice work
@xuxu119 2 жыл бұрын
could you please go through the meshing process in your particular example with the CFD software? it would be interesting to see how you did your mesh sizing analysis (coarse -medium-fine) to find out your heat exchange ratio just like what you talked about in your professional CFD course on Udemy.
@fluidmechanics101 2 жыл бұрын
Yes! Good idea. I will see if I can put together a video on some of the details
@xuxu119 2 жыл бұрын
@@fluidmechanics101 thank you. A lot of us engineers know how to run the automatic meshing process in the CFD software but 99% of the time the automatically generated meshing doesnt work because we fail to understand the Y+ and Y* . So, what we really need in most cases is a structured mesh considering the solver, mesh sizing and etc. I have to admit that some of these skills have to be gained through years of simulation but I think you have a gift in teaching because the way to present these topics is excellent. again, thank your for sharing your knowledge.
@indraneelsingh4854 2 жыл бұрын
@@xuxu119 nowadays, generating structured mesh isn't that big of a problem especially with meshing technologies like mosaic meshing. Especially in industry where time is fairly valuable, using an automated mesh process that give you a decent structured mesh in the core with sufficient boundary layer is all you need.
@foamer2706 2 жыл бұрын
wonderful~
@onuroruc4967 2 жыл бұрын
Excellent
@sudhanshumaurya2860 2 жыл бұрын
I saw you youtube channel's description attached on airshaper's website. Thats awesome.❤❤
@fluidmechanics101 2 жыл бұрын
Awesome! I will thank Wouter when I speak to him next
@Darkkenfox 2 жыл бұрын
Great new series of videos! Please upload more videos about CFD analysis of real cases 😀
@ericuk9814 2 жыл бұрын
New stuff to learn
@panashelynn Жыл бұрын
I have just started my Master's degree in Nuclear Energy Engineering from a Mechanical background. My research topic will be on the LFR flow (using LBE ) and heat transfer in tube bundles. This video has helped me to have an idea of what l am about to face. THANK YOU SO MUCH!!🙏
@fluidmechanics101 Жыл бұрын
Definitely check out the technical volume on liquid metals and the case studies. You will find loads of helpful stuff in there 🙂
@panashelynn Жыл бұрын
@@fluidmechanics101 thanks so much 😅. I will check it out.
@domenicobianchi8 2 жыл бұрын
Terrific study. Thanks for bringing this real engineering case study in the channel. i would have million questions...i'll ask only one: could you show in detail how to include a source term in the k-w equations (to account for buoyancy in the production of turbulent kinetic energy in the transport equation for k as explained in the report) ?
@fluidmechanics101 2 жыл бұрын
In ANSYS CFX and Fluent, there is a button that allows you to do this, so it is really easy. In other codes it might be more difficult and you may need to code it yourself
@domenicobianchi8 2 жыл бұрын
The report explains how the solution was developed in several stages and proceed to explain them, but could you explain how you practically go from one step to another? they are like different simulations in series or in some way you can stop one simulation and modify parameter and other stuff and then restart? really i dont have a clue about this and i'm really interested about this. Would be an excellent idea for an entire video too imho. Keep up the amazing works (i bought your courses as well)
@fluidmechanics101 2 жыл бұрын
Yes, in a practical way you can take the results of one simulation and then use these results as an initial condition for the next simulation (just changing a parameter like turbulent Prandtl number, flow rate or heat input). This is a really efficient way of doing lots of simulations quickly and is commonly used in many areas where we need to look at a large parameter space
@domenicobianchi8 2 жыл бұрын
@@fluidmechanics101 thanks very much! Anothere quick one is why we chose kw sst? Simply because at the end of the day its the best one for wall guided flow? I wonder if there where another accettable candidate!
@fluidmechanics101 2 жыл бұрын
The best turbulence model is problem dependent and none of them are perfect. The only way to know is to carry out a test against experimental data for a simple flow scenario that is similar to yours. The best turbulence model for this case is likely to also be the best for your case. It just happens that KW SST seems to be pretty good for a lot of cases these days (probably by chance more than anything)
@domenicobianchi8 2 жыл бұрын
@@fluidmechanics101 great, so have u tried also another model?
@fluidmechanics101 2 жыл бұрын
Yes, we looked at a few. You can see the details in Case Study 1 (Liquid metal CFD modelling of Tall-3D test facility). We also have a comparison to LES
@santoshn8450 2 жыл бұрын
Hi , I listen to your videos, it quite well explained. very thank full to you. I would like to ask you if you could explain the phase change in cryogenics LH2. Today commercial codes had a very limitation to resolve
@kyekyekukwasioppong6489 2 жыл бұрын
Thank big guy
@xXBaller4LifeXx 2 жыл бұрын
awesome content! i would love to see the other case studies too. how long did this project take roughly?
@fluidmechanics101 2 жыл бұрын
It was quite a long project! A good year to set up the simulations, run, post process and write the report
@Linduxito 2 жыл бұрын
Impressive work! That mesh in a second order solution! I work on the thermal design of nuclear components and it is nice to find reports with this quality open to the public. I will read carefully all the reports since blackouts are always a pain in the neck to model using CFDs. I am curious about how the heat generation is included. Is there a MCNP model (maybe another particle transport solver)? 1d profiles?
@fluidmechanics101 2 жыл бұрын
It's just a volumetric heat source that varies across the core. The central fuel assembly porous zones have a larger heat source than the outer fuel assembly porous zones
@blackbeard6296 2 жыл бұрын
make it a series please
@rojhasan548 Жыл бұрын
Thank you for such an in depth and engaging guide. Not only does this detail the CFD modelling side of things but it has really educated me in nuclear reactor designs and the disaster scenarios. This is much appreciated! I do have a question that might be a bit silly since you may have covered this earlier on in the video, but I was wondering: At 55min, you described the meshing of the fuel assemblies and the interwrapper region modelled as porous media. Since the fuel assembly is modelled as a solid and the interwrapper as a fluid, how do you stop the solver violating the V.n=0 to the solid? i.e. the fluid from the interwrapper region leaking into the fuel assembly porous region?
@fluidmechanics101 Жыл бұрын
Both the fuel assembly block and the interwrapper gap are porous media, so fluid can flow in both of them. The key is to use a two-sided wall (zero thickness wall) between them, so that fluid can't pass between them
@kacemkacem1985 2 жыл бұрын
awesome explanation thanks a lot , is there any source or website for real case studies like this one to prosper my cfd knowledge ?
@fluidmechanics101 2 жыл бұрын
Yes. If you check out the link in the description, the website has 4 case studies and 6 technical volumes which are all fantastic sources for your CFD knowledge
@kacemkacem1985 2 жыл бұрын
@@fluidmechanics101 thanks
@nanodynamics5203 2 жыл бұрын
What software did you use? Great stuff
@fluidmechanics101 2 жыл бұрын
Generally I use different software for different projects. Here is used CFX for the CFD, ANSA for meshing and Latex for writing the report
@combustionlab8081 2 жыл бұрын
Hello i am a huge fan, and i have a question. I previously tried to use poly hexcore meshes i generated using ansys fluent emdded meshing but eventhough i manged to convert the mesh to polymesh (which is really tricky) the results i got were effected by the polygonal meshes in a way ansys results arent affected. this got me thinking that Fluent code has some way of compansating for these types of meshes but openfoam doesnt. What do you think about this and what would you reccomend to be able to use these fluent generated poly hexcore meshes in openfoam. Thanks in advance you are awesome.
@fluidmechanics101 2 жыл бұрын
I'm not sure about this one, I have to say! What type of case were you running and how fine was your mesh?
@user-ou8jk4br8w 2 жыл бұрын
It would be great if you can discuss the modification of the turbulent Prandtl number since this is the low Prandtl number fluid.
@fluidmechanics101 2 жыл бұрын
Yes 🙂 there is some detail in the report (and the technical volume for liquid metals) if you would like more info
@agustinvillaortiz3590 2 жыл бұрын
There are other approaches, like algebraic/transport equation models for turbulent heat fluxes to deal with these flows.
@_fubar 2 жыл бұрын
It would be really useful to know how long it took to run the simulation (after meshing) to get these results and on what compute resources.
@fluidmechanics101 2 жыл бұрын
Roughly 2-3 days steady state on 40 cores. Then about 1-2 weeks for the transient on 40 cores. Not massive but deliberately achievable for most engineers
@bonati61 2 жыл бұрын
You definitly should go into more details, becuase as you said, you just glanced by some major details, like getting the right boundary conditions, building the mesh and dealing with bad elements, and hard to mesh places (normally overlooked at reports), or look more closely at the results of natural convection. Overall, congratulations, really great video, you centrally could make a series from this report.
@fluidmechanics101 2 жыл бұрын
Yes exactly! I thought I would give an overview here and then go into more detail if it is popular
@Mikey-mv5xn 2 жыл бұрын
Which tool you are using from meshing of this reactor analysis?
@fluidmechanics101 2 жыл бұрын
ANSA 🙂 meshing takes a long time but the meshes are great for CHT
@Mikey-mv5xn 2 жыл бұрын
Sir can you please make some tutorial videos of how to make effective meshing using meshing tool. It really helps. Thanks in advance
@hardiktankariya4772 2 жыл бұрын
Could you tell me what i do to understand basic cfd
@fluidmechanics101 2 жыл бұрын
I would start with some tutorials that come with your CFD code. You should be able to find these with the installation files
@hardiktankariya4772 2 жыл бұрын
Ok@@fluidmechanics101
@fluidmechanics101 2 жыл бұрын
Or ... if you want to understand what the CFD code is actually doing behind the scenes I have some fundamentals courses for beginners on Udemy (link in the video description). I suppose it depends if you want to be able to do CFD or understand what the code is doing 🙂
@CAL1MBO 2 жыл бұрын
Damn bro
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