Discover and read the best of Twitter Threads about #cfd
Most recents (24)
(0/n) Tomorrow, #Belgian #cycling season starts again with opening classic @OmloopHNB @Nieuwsblad_be Upon several requests, we provide thread on our research in cycling #aerodynamics including practical ramifications. Work by @KU_Leuven et al. in partnership with @Ansys
#Science
#Science
(1/n) Well-known: cyclist in slipstream of another cyclist can typically get aerodynamic drag reduction of 30-40%. Is much more behind motorcycle, car or train. Known since at least 1899. “#Drafting” in the #slipstream is therefore common practice.
#Science #Engineering #cycling
#Science #Engineering #cycling
(2/n) This is because air as medium gives pressure field so 1st rider literally gets “push” by 2nd. We published this in 2013. First lot of criticism & disbelief, now many say “we know this all along”. Yeah right 😊. That’s how it always goes… urbanphysics.net/2013_CAF_BB_TD…
#Cycling
#Cycling
What is computational fluid dynamics(CFD), how does it work, and when was it used in F1?
Computational Fluid Dynamics, in other words, is a computer simulation of fluid behavior.
The program was created by Air Force and Aerospace engineers and debuted in Formula 1 in 1990.
1/8
Computational Fluid Dynamics, in other words, is a computer simulation of fluid behavior.
The program was created by Air Force and Aerospace engineers and debuted in Formula 1 in 1990.
1/8
It is now one of the most important elements for teams to develop cars, it is no less important than the wind tunnel, and it may become even more important in the future,due to its integration with artificial intelligence, which has become an integral part of the tools of F1.
2/8
2/8
There is a future plan that has not been implemented in which CFD will be the primary element after the wind tunnel is eliminated.
And if we look at this season, we will see things that happened for the first time at the level of the big teams,
3/8
And if we look at this season, we will see things that happened for the first time at the level of the big teams,
3/8
ماهو CFD وكيف يعمل ومتى تم استخدامه في الفورمولا1 باللغة الانجليزية
Computational Fluid Dynamics
ومعناها بالعربية هي حوسبة ديناميكيا الموائع او بمصطلح آخر هي محاكاة لعمل الموائع عن طريق الكمبيوتر.
1/٧
Computational Fluid Dynamics
ومعناها بالعربية هي حوسبة ديناميكيا الموائع او بمصطلح آخر هي محاكاة لعمل الموائع عن طريق الكمبيوتر.
1/٧
تم تصميم البرنامج عن طريق مهندسين القوة الجوية والفضاء وتم استخدامه في رياضة السيارات لأول مرة عام 1990 في الفورمولا 1
واصبح في وقتنا الحالي من اهم العناصر لدى الفرق لأجل تطوير السيارات ولا تقل اهميته عن اهمية نفق الهواء
٢/٧
واصبح في وقتنا الحالي من اهم العناصر لدى الفرق لأجل تطوير السيارات ولا تقل اهميته عن اهمية نفق الهواء
٢/٧
وقد يكون اكثر اهمية مستقبلا وذلك بسبب دمجه مع الذكاء الاصطناعي الذي اصبح جزءاً لا يتجزأ من ادوات رياضة الفورمولا1.
هناك خطة مستقبلية (لم تعتمد بعد) بموجبها يصبح CFD العنصر الاساسي بعد الاستغناء عن نفق الهواء.
٣/٧
هناك خطة مستقبلية (لم تعتمد بعد) بموجبها يصبح CFD العنصر الاساسي بعد الاستغناء عن نفق الهواء.
٣/٧
I did @officialBinotto's @ScuderiaFerrari SF71H in @FluidX3D #CFD on a supercomputer.
- 1s in real life @ 100km/h
- 20s 4K60 video (3x)
- 14h compute on 8x @AMDInstinct #MI200 64GB #GPU
- 144TB data visualized
What I found is absolutely wild. A #SimulationFriday #F1 thread: 🧵1/5
- 1s in real life @ 100km/h
- 20s 4K60 video (3x)
- 14h compute on 8x @AMDInstinct #MI200 64GB #GPU
- 144TB data visualized
What I found is absolutely wild. A #SimulationFriday #F1 thread: 🧵1/5
The @FluidX3D simulation was done at 10 billion voxel grid resolution (2152×4304×1076), over 217k time steps (1 second), at Re=3.75M (100km/h).
The fins on the front spoiler create a turbulent boundary layer and kick up it up onto the front wheels to reduce drag. 🧵2/5
The fins on the front spoiler create a turbulent boundary layer and kick up it up onto the front wheels to reduce drag. 🧵2/5
The streamlined chassis guides airflow under the spoiler to create down force. The halo - one of the best additions to the sport in terms of safety - is rather aerodynamic.
Each frame of the video is 120GB, 144TB for 1201 frames. @FluidX3D renders the data directly in VRAM. 🧵3/5
Each frame of the video is 120GB, 144TB for 1201 frames. @FluidX3D renders the data directly in VRAM. 🧵3/5
🧵
“What Is #LongCOVID—and How Are We Going to Solve It? This potentially life-altering post-viral syndrome may have affected as many as 23 million Americans (and counting)”
Contains quite a bit of discussion about #MEcfs
prevention.com/health/health-…
#CFS #PwLC #PwME #CFSME
1/
“What Is #LongCOVID—and How Are We Going to Solve It? This potentially life-altering post-viral syndrome may have affected as many as 23 million Americans (and counting)”
Contains quite a bit of discussion about #MEcfs
prevention.com/health/health-…
#CFS #PwLC #PwME #CFSME
1/
2/
“We’re starting to gain more understanding of what’s driving #longCOVID & who is most at risk, & the more we understand, the more it will help us get a grip on similar chronic illnesses, like #MECFS, that have been largely ignored for far too long” - @VirusesImmunity
#CFD
“We’re starting to gain more understanding of what’s driving #longCOVID & who is most at risk, & the more we understand, the more it will help us get a grip on similar chronic illnesses, like #MECFS, that have been largely ignored for far too long” - @VirusesImmunity
#CFD
3/
“In those who felt ill from #postCOVID19 syndrome for at least six months, the most common symptoms were fatigue, cognitive dysfunction, & post-exertional malaise (a triad that besets many people with #MECFS), according to the study” of 3762 patients by @patientled
#LongCovid
“In those who felt ill from #postCOVID19 syndrome for at least six months, the most common symptoms were fatigue, cognitive dysfunction, & post-exertional malaise (a triad that besets many people with #MECFS), according to the study” of 3762 patients by @patientled
#LongCovid
⚡Aeroelastic Flutter⚡
The Tacoma Narrows bridge disaster of 1940 attribute the collapse of the bridge due to aeroelastic flutter.
🧵👇
The Tacoma Narrows bridge disaster of 1940 attribute the collapse of the bridge due to aeroelastic flutter.
🧵👇
1️⃣ Flutter is a dangerous phenomenon encountered in flexible structures subjected to aerodynamic forces. Flutter occurs as a result of interactions between aerodynamics, stiffness, and inertial forces on a structure.
2️⃣ In an aircraft, as the speed of the wind increases, there may be a point at which the structural damping is insufficient to damp out the motions which are increasing due to aerodynamic energy being added to the structure.
I have benchmarked the new @AMDInstinct MI250 #GPU at @fzj_jsc, and it is disappointing but also impressive. Let me explain.
🧵1/6
cc @HPC_Guru @hpcprogrammer @IanCutress @ProfMatsuoka @sunitachandra29 @aschilling @wkmyrhang @VideoCardz @AMDGPU_
#HPC #Top500 #MI200 #Exascale
🧵1/6
cc @HPC_Guru @hpcprogrammer @IanCutress @ProfMatsuoka @sunitachandra29 @aschilling @wkmyrhang @VideoCardz @AMDGPU_
#HPC #Top500 #MI200 #Exascale
The #MI250 is misleadingly marketed as "one chiplet GPU" with 13312C, 90TFLOPs & 128GB @ 3.2TB/s.
But it is not. The 2 GCDs are 2 separate GPUs with 64GB each, like a K80 dual-GPU but in a socket. One #GPU can't directly access the other's memory.
🧵2/6
amd.com/en/products/se…
But it is not. The 2 GCDs are 2 separate GPUs with 64GB each, like a K80 dual-GPU but in a socket. One #GPU can't directly access the other's memory.
🧵2/6
amd.com/en/products/se…
To use both GCDs, the software needs to be multi-GPU capable. For many algorithms this is very difficult and for some it is entirely infeasible. The desire for large unified memory is huge.
The #MI250 promises exactly that with "128GB", but delivers only half.
🧵3/6
The #MI250 promises exactly that with "128GB", but delivers only half.
🧵3/6
#ChicagoScanner #Chicago
And another marine distress call in the playpen
Coming in as
700 N on the Lakefront
Boat in distress
Might have hit another boat
And another marine distress call in the playpen
Coming in as
700 N on the Lakefront
Boat in distress
Might have hit another boat
#ChicagoScanner
To clarify, two separate incidents in the playpen, back to back
The new incident boaters see 6-8-8 from the previous rescue
A boat capsized and occupant(s) swam to a nearby boat
To clarify, two separate incidents in the playpen, back to back
The new incident boaters see 6-8-8 from the previous rescue
A boat capsized and occupant(s) swam to a nearby boat
#ChicagoScanner #Chicago
Another successful save
Transporting wet but uninjured victims to the Bus turnaround at Navy Pier
All companies returning including helo 6-8-2
Another successful save
Transporting wet but uninjured victims to the Bus turnaround at Navy Pier
All companies returning including helo 6-8-2
#CfD results are in!!
£37.35 /MWh for offshore wind - securing 7GW
£42.47/MWh for onshore wind
[with correct numbers now!]
assets.publishing.service.gov.uk/government/upl…
£37.35 /MWh for offshore wind - securing 7GW
£42.47/MWh for onshore wind
[with correct numbers now!]
assets.publishing.service.gov.uk/government/upl…
Given commodity costs, uncertainty in the market and networsk charges (Scottish projects face particularly high costs), these offshore prices are, once again, amazing.
In chart form (onshore wind in 2024 gets abit lost in that cluster).
Important new paper from the man whose work @thegwpfcom cites as evidence that offshore wind costs are not falling, clarifying that his work shows nothing of the kind sciencedirect.com/science/articl…
Two years ago John Aldersey-Williams of @redfieldconsult and @RobertGordonUni showed that the apparent levelised cost of electricity from operating offshore wind farms, derived from company accounts, was in some cases higher than the strike prices agreed in recent #CFD auctions
That paper covered wind farms commissioned as far back as 2003 (North Hoyle), long before the current competitive #CFD auctions came in. It found no trend in costs, either up or down, instead concluding that costs varied between individual projects depending on circumstances
My department at @polymtl seeks to hire a tenure track Prof in Computational Fluid Dynamics #CFD #academicjobs
polymtl.ca/carriere/en/of…
Eight reasons you should apply: 1/9
polymtl.ca/carriere/en/of…
Eight reasons you should apply: 1/9
Teaching is done in French. Research is done French or English. Speaking French is not a requirement for hiring. We'll get you a private French tutor and reduce your teaching load to help you become fluent!
2/9
2/9
Tenure and promotion are fast as compared to elsewhere in North America. Tenure is normally granted after four years.
3/9
3/9
CFD trading stands for Contracts For Difference and allows investors to trade on a wide range of markets.
But when it comes to choosing the right broker... What should you look for? What make a great and reputable CFD broker?
#cfd #cfdbroker #forexbroker
cfdspy.com/cfd-brokers/
But when it comes to choosing the right broker... What should you look for? What make a great and reputable CFD broker?
#cfd #cfdbroker #forexbroker
cfdspy.com/cfd-brokers/
1. Regulation. Make sure your contracts for difference broker is regulated by FCA or other respected regulatory authority. Remember, you money could be at risk if you trade with a dodgy broker.
2. Competitiveness. Is your broker competitive enough when it comes to spreads and overnight financing charges? Remember, those charges will add up and drain your account so make sure you choose a solid broker.
Are you already trading in CFD or a beginner? CFD is a popular derivative trading product. It allows you to speculate on the financial markets, which include shares, forex, commodities, etc.
This thread show the advantages of CFDs.
#cfd #cfdtrading
cfdspy.com/guide/cfd-adva…
This thread show the advantages of CFDs.
#cfd #cfdtrading
cfdspy.com/guide/cfd-adva…
Trading In Rising & Falling Market
When you can trade in both directions, it opens up more trading opportunities for you. For example, if you buy shares, you only make money when the price goes up. With CFD trading, you can also profit by selling shares when the price go down.
When you can trade in both directions, it opens up more trading opportunities for you. For example, if you buy shares, you only make money when the price goes up. With CFD trading, you can also profit by selling shares when the price go down.
Invest In Range Of Markets
Traders get a chance to invest in various financial markets through one singular online trading platform. With CFD, trading in forex, shares, commodities, bonds, and others are possible from a single account.
#market #StockMarket
cfdspy.com/markets/range-…
Traders get a chance to invest in various financial markets through one singular online trading platform. With CFD, trading in forex, shares, commodities, bonds, and others are possible from a single account.
#market #StockMarket
cfdspy.com/markets/range-…
When it comes to CFD or forex trading, it's important that you deal only with reputable and regulated brokers; there's no need to cut corners and hope for the best, just go with the best.
Where's what you're looking for:
#CFD #cfdbroker #forexbroker
cfdspy.com/cfd-brokers/
Where's what you're looking for:
#CFD #cfdbroker #forexbroker
cfdspy.com/cfd-brokers/
1. How are the spreads? are you satisfied? Shop around as there are so many brokers to choose from. A bit of leg work will save you time and money.
2. Happy with the range of markets? That's where you really have to dig in and investigate. If your CFD or forex broker does not provide the markets you trade then what's the point even if they have low spreads?
You may often hear professional and successful CFD and forex traders talk about a trading plan. What what is it? Do you really need one?
The short answer is "yes", you need a trading plan.
In this thread we cover a few fundamentals.
#trading #cfds #forex
cfdspy.com/tips/trading-p…
The short answer is "yes", you need a trading plan.
In this thread we cover a few fundamentals.
#trading #cfds #forex
cfdspy.com/tips/trading-p…
1. You need to set up your trading targets. What do you want to achieve trading forex or CFDs (or any other financial market)? You need to set realistic and feasible objectives and adhere to your plan throughout your trading.
#forex #cfd #target
#forex #cfd #target
2. Once you're ready to trade, surely you'll need to employ some strategies, they might be short and long term strategies depending on the time you have but it's vital to come up with the strategies you'll be using for your CFD trading.
#strategies
cfdspy.com/strategies/cfd…
#strategies
cfdspy.com/strategies/cfd…
Currently, there are over 100 forex and CFD brokers on the market, all with their offerings and trading platforms. So how do you find a great broker? What to look for and what what providers to avoid?
cfdspy.com/cfd-brokers/
#cfd #cfdbroker #trading #trader
cfdspy.com/cfd-brokers/
#cfd #cfdbroker #trading #trader
Regulation. Make sure your CFD broker is regulated by some prominent regulator such as FCA (UK), ASIC (Australia), Cysec (Cyprus), or FSB (South Africa), your CFD provider should be regulated by at least one of those regulators.
Avoid unregulated brokers at all costs.
Avoid unregulated brokers at all costs.
Range of markets. With so many CFD trading companies, you are spoiled with choices and have the right to go for a broker which offers all the financial markets you want to trade but remember, just because a brokerage offers over 10k markets doesn't mean it's the best.
#brokerage
#brokerage
When it comes to financial markets and CFD trading, it makes you wonder how some traders manage to consistently make profit while so many around fail miserably.
This thread looks into what successful CFD traders have in common.
#CFD #investing #stockmarket
cfdspy.com/guide/who-trad…
This thread looks into what successful CFD traders have in common.
#CFD #investing #stockmarket
cfdspy.com/guide/who-trad…
Successful traders tend to specialise and know their traded markets upside down, just think of hedge funds, each fund specialises in 1 particular market and thoroughly researches it.
Know your market
#market #cfdtrader #trader
cfdspy.com/markets/range-…
Know your market
#market #cfdtrader #trader
cfdspy.com/markets/range-…
Manage the risk. CFDs and other leveraged products are very risky and thus should be treated as such. Never underestimate the risks and tread with caution. Risk management should be high on your agenda if you want to consistently make money on the financial markets.
We keep talking about the benefits of Contracts For Difference (CFDs) but barely ever mention the risks associated with them.
So we decided to correct the mistake and answer 3 questions in this thread:
1. Is leverage good?
2. Are CFDs risky?
3. Can I easily make money with CFDs?
So we decided to correct the mistake and answer 3 questions in this thread:
1. Is leverage good?
2. Are CFDs risky?
3. Can I easily make money with CFDs?
Is leverage good?
You will read on many websites that leverage is a double edged sword. It means it can bring you good profits and CAUSE BIG LOSSES.
You have to make sure you keep the leverage in check and learn how to use it to your advantage.
#CFD
cfdspy.com/leverage/cfd-l…
You will read on many websites that leverage is a double edged sword. It means it can bring you good profits and CAUSE BIG LOSSES.
You have to make sure you keep the leverage in check and learn how to use it to your advantage.
#CFD
cfdspy.com/leverage/cfd-l…
Are CFDs risky?
A simple answer is YES. CFD trading is risky.
If you want to see the proof then visit any CFD broker and you'll see that on average over 70% of accounts lose money. Thus more traders lose money than gain.
#cfdbroker #investing
cfdspy.com/cfd-brokers/
A simple answer is YES. CFD trading is risky.
If you want to see the proof then visit any CFD broker and you'll see that on average over 70% of accounts lose money. Thus more traders lose money than gain.
#cfdbroker #investing
cfdspy.com/cfd-brokers/
Currently, there are over 100 brokers to choose from to trade Contracts For Difference (or simply CFDs) but comparing them all is a hard task. So which CFD broker should you use?
In this thread we list vital characteristics of a reliable provider.
independentinvestor.com/brokers/cfds
#broker
In this thread we list vital characteristics of a reliable provider.
independentinvestor.com/brokers/cfds
#broker
1. Regulation. Broker regulation plays an important roles. Who would you rather trade with, a reputable and heavily regulated broker or unregulated one? Two, probably, strictest regulators are FCA (UK) and ASIC (Australia).
Stay away from unregulated brokers.
Stay away from unregulated brokers.
2. Range of markets. Some CFD brokers offer just 100 or so financial markets whereas others can offer over 10,000 instruments. When selecting a trading platform, make sure you check what markets they have on offer.
independentinvestor.com/cfd/markets
#cfd #markets #trading
independentinvestor.com/cfd/markets
#cfd #markets #trading
CFD trading offers a range of benefits and there's a reason why it's become so popular among retail traders.
But... there are also disadvantages and costs associated with CFDs and in this thread we will see how CFD brokers make money (the charges).
#CFD
cfdspy.com/cfd-brokers/
But... there are also disadvantages and costs associated with CFDs and in this thread we will see how CFD brokers make money (the charges).
#CFD
cfdspy.com/cfd-brokers/
1. The first cost in incurred by the long term traders and it's the overnight financing. This is the the cost a trader has to pay every night for holding his/her position (it's usually around base currency borrowing rate + 2%).
cfdspy.com/leverage/finan…
cfdspy.com/leverage/finan…
2. The spread. The spread is the difference between ask and bid prices or the difference between the prices you pay to buy and sell your market instrument.
Traders incur this cost with every single CFD trade they make.
Traders incur this cost with every single CFD trade they make.
Great to have our work on bacterial attachment in stent-on-chips published in @micromach_mdpi at mdpi.com/2072-666X/11/4…!
👇summary thread below👇
With @GarethLuTheryn @aliizzzzz94 @AMosayyebi @Center4Biofilm @MiNaTherGroup @uos_bioengsci @ukbiofilms @UoSEngineering 1/7
👇summary thread below👇
With @GarethLuTheryn @aliizzzzz94 @AMosayyebi @Center4Biofilm @MiNaTherGroup @uos_bioengsci @ukbiofilms @UoSEngineering 1/7
Obstructions of the ureter can be caused by a number of factors and affect the physiological flow of urine from kidney to bladder. To overcome this issue, ureteral stents which have side-holes bypassing urine from ureter to stent and viceversa, are clinically implanted. 2/7
However, stents are prone to complications leading to infection. We employed microfluidics to mimic flow dynamics in ureteral stents in different obstruction (obs) conditions: 1) unobstructed 2) obs at proximal side-hole 3) obs in between side-holes 4) obs next to side-hole. 3/7
A short coverage of CFD trading markets and how it all began. How Contracts For Difference managed to become so popular and now available in the most of the countries for retail traders and investors?
#cfds #investing #trading #cfdtrading
cfdspy.com/guide/cfd-intr…
(it is a thread)
#cfds #investing #trading #cfdtrading
cfdspy.com/guide/cfd-intr…
(it is a thread)
As most would guess, CFD trading started in the City of London in the early 1990's as a type of margined equity swaps. At first, they were only available to institutional traders and investors such as hedge funds.
Leverage and no UK stamp duty made it happen.
Leverage and no UK stamp duty made it happen.
Late 1990's and Contracts For Difference were finally introduced to the retail traders, first in the UK and in early 2000's to all retail traders around the world.
Once again the leverage played a vital role in growing popularity.
#Leverage #CFD
cfdspy.com/leverage/cfd-l…
Once again the leverage played a vital role in growing popularity.
#Leverage #CFD
cfdspy.com/leverage/cfd-l…
Why most of CFD traders lose money?
When you visit your broker's site, you will see how many accounts lose money, this figure will likely be over 70%; thus over 70% of CFD traders lose money.
Ever wondered why?
Let's see in this thread.
independentinvestor.com/cfd/why-trader…
#forex #cfd #trader
When you visit your broker's site, you will see how many accounts lose money, this figure will likely be over 70%; thus over 70% of CFD traders lose money.
Ever wondered why?
Let's see in this thread.
independentinvestor.com/cfd/why-trader…
#forex #cfd #trader
Reason 1: Gambling. Gambling is probably the most common reason why so many CFD traders lose money. People get drawn into trading in a hope of making a quick buck and then end up losing money due to gambling and hoping for a lucky break.
#cfdTrading #CFD
#cfdTrading #CFD
Reason 2: Over-leveraging. Leverage is tricky as it is one of the pillars of CFD trading but at the same time most of the risks are associated with it. Try to keep the leverage in check and never put much of your capital at risk.
independentinvestor.com/cfd/trading-on…
#Leverage #tradingrisk
independentinvestor.com/cfd/trading-on…
#Leverage #tradingrisk
