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This is cavitation inside a piston diaphragm pump. Most engineers spend their entire careers hearing this destructive phenomenon. Almost none ever get to see it with their own eyes. When pressure drops below a critical threshold, liquid instantly flashes into vapor, creating thousands of microscopic bubbles throughout the system....

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This looks like a simple transparent shock absorber filled with oil. But what you are seeing is one of the most destructive phenomena in fluid engineering. This is cavitation in its true form. The white cloud forming beneath the piston is not foam and it is not air. The oil is literally changing from liquid to vapour at room temperature. When the piston moves rapidly, the oil is forced through tiny passages inside the damper. The fluid velocity increases, the local pressure drops, and if it falls below the oil's vapour pressure, the liquid begins to boil without any increase in temperature. The moment the pressure recovers, those microscopic vapour bubbles collapse almost instantly. And that is where the real damage begins. The destructive forces of cavitation is really not understood well by most. A collapsing cavitation bubble creates shockwaves and high-speed microjets that strike nearby surfaces with enormous local forces. Repeated millions of times, these tiny implosions can slowly eat away hardened metals, destroy precision components and reduce the lifespan of expensive machinery across industries. This same invisible phenomenon is one of the biggest challenges in naval engineering. Ship propellers operating under enormous loads can suffer cavitation erosion, losing efficiency while creating underwater noise. For advanced stealth submarines, that noise can become a major problem because cavitation can reveal their position. Decades of research have gone into specialised propeller designs, pump-jets, surface finishes and hydrodynamic optimisation to delay its formation. The same issues affects hydroelectric turbines that convert the energy of entire rivers into electricity, and industrial pumps that move oil, chemicals and water through critical infrastructure around the world. Perhaps the most remarkable part is that after 4-5 decades of advances in metallurgy, coatings and manufacturing, engineers still cannot simply build a material that is immune to cavitation. The solution is not to make stronger metals forever. It is to understand the fluid dynamics so precisely that cavitation is prevented before in those destructive bubbles ever form.

Ammanichanda

1,181,865 views • 4 days ago

Apparently, I saw this video online and I decided to share. What this worker is applying is called bitumen, or what many of us know as bituminous coating. Most people think a wall is a solid, impenetrable block, but in reality, it is more like a sponge. Concrete and blocks have microscopic pores that pull water from the earth through a process we call capillary action. This thick black substance is the shield that stops that water from climbing up into the house. It is not about making the wall look good because this part will be buried under the dirt forever. It is about creating a skin that water cannot breathe through. When do you need to do this? The need for this arises because the soil is a very aggressive environment. Water is not your only enemy.. The ground also contains salts and sulfates that want to eat away at the cement. If this moisture finds its way to the steel bars inside the columns, those bars will start to rust. And when steel rusts, it expands, and that expansion is what cracks the concrete from the inside out. This coating is the only thing standing between your foundation and that kind of slow destruction. Thats is why if you see wet patches at the bottom of your walls inside your house, it usually means someone skipped this step or did it poorly during construction. You can apply this anytime you are building parts of a structure that will stay in contact with the ground. It is common in areas where the water table is high or where the soil stays damp for most of the year. This is a one-shot opportunity. Once you backfill the soil, you can never go back to fix it without a lot of expense and a lot of digging. It is about having the foresight to protect the heart of the building while it is still exposed. Please don’t ignore this if you need to. If you ignore it now to save a bit of money, you will be funding the future decay of your own home. I hope this helps.

A.Y.O

75,105 views • 3 months ago

The fascinating concept of Non-Newtonian fluids, which transition from a liquid state to a solid-like state when pressure is applied, has a rich history that spans several centuries. The study and understanding of these peculiar fluids have evolved over time, leading to a wide range of practical applications and scientific insights. One of the earliest references to Non-Newtonian behavior in fluids dates back to the 17th century when Sir Isaac Newton formulated the basic principles of fluid mechanics. Newton's laws of fluid motion primarily applied to Newtonian fluids, which exhibit constant viscosity and flow behavior regardless of the applied force or pressure. However, it soon became apparent that not all fluids behaved in this predictable manner. In the mid-19th century, a scientist named Thomas Andrews made significant contributions to the understanding of Non-Newtonian fluids. Andrews conducted groundbreaking experiments with carbon dioxide, revealing that under high pressure, this gas could transform into a liquid. This observation marked one of the earliest instances of pressure-induced phase changes in fluids. The term "Non-Newtonian" itself was coined in the 20th century to describe fluids that did not adhere to Newton's classical laws of fluid dynamics. These fluids exhibited a variety of behaviors, but one of the most intriguing was their ability to solidify or increase in viscosity when subjected to stress or pressure. One of the most famous examples of such behavior is cornstarch mixed with water, which forms a substance known as "oobleck" that becomes more solid when pressure is applied. In the modern era, Non-Newtonian fluids have found applications in various fields, including food science, engineering, and material science. They are used in products like quicksand, body armor, and even in the development of impact-resistant materials. One of the key insights that emerged from the study of Non-Newtonian fluids is the importance of understanding the relationship between stress and strain, as well as the influence of time-dependent properties on their behavior. This knowledge has led to advancements in rheology, the study of flow and deformation in materials, and has practical implications in areas such as industrial processing, medicine, and the design of everyday products.

Historic Vids

2,632,800 views • 2 years ago

The political establishment in Australia is not entirely stupid, they just think you are. As they lament the rise of One Nation, they pretend they don't understand it. Because if they showed us that they understand the resons, they then have to make a major admission. Hanson's rise is all their fault. Because the major parties and the faux independents have been on a unity ticket on all of the big problems they have jointly caused for decades. They can’t hide from the messes they have caused, so now they want to blame everyone else but themselves. Today, on ABC’s Insiders, Annabel Crab belled the cat, as Karvelas did the two step crab walk. Annabel correctly diagnoses the political situation here right now. It is not a love for Hanson, or One Nation that is causing the surge, but a total lack of faith in the other offerings. It almost does not matter what Hanson says or does, because her greatest strengths are that she is there, and she is not one of them. Those are enduring traits and the more the major parties hit her, the more the media carry on about her, and the more the establishment present her as a “deplorable”, the more people they will push in her direction. It is like they are in quicksand... the more they struggle, the deeper they sink. People are growing ready for wild political change. A worsening economy and a growing collapse in social cohesion has put the nation on edge. The big end of town want to pretend everything will be fine when the latest special envoy delivers their newest report, but nothing changes. Nothing changes because nothing is supposed to change. Because the government, the opposition and their Green Teal cheer squads want things just the way they are. They didn’t just pass all of the enabling legislation for no reason. There are real beneficiaries of these things, it is just that none of the beneficiaries are the Australian people. Australians have broadly been the target of the changes made to benefit foreign interests, the political class and major corporations. We have been targeted for so long it is impossible not to feel the cross-hairs of the scope resting on our forehead. Hanson and her team simply have to talk about that feeling... they don’t even have to have a solution. Because when the establishment continues to pretend the problems don't exist, just acknowledging the pain is enough to earn a vote. Annabel nails this sentiment in just a few words. Right as Karvelas changes the subject, because it is not that this isn’t obvious, it is because Karvelas is there to cover it up, and hit Hanson’s credibility again. Fuelling the vicious cycle of the rise of the outsider. Unless something significant changes in the establishment, and I don’t expect it will, there will be major upheaval at the next election. Most people will not be voting for their favourite party or person, they will primarily be voting against the status quo, because in their minds, it could not possibly be worse than what we have experienced for decades... but it just might be a little bit better. And that is a risk worth taking. After all most of us like a punt. I just want Australia back.

Matthew Camenzuli

50,238 views • 14 days ago

THE FINAL STRETCH BEFORE EVERYTHING CHANGES….💫🛸💫 💥Note to Anons- Patriots: You have been through more than you let on, more than anyone knows, the sleepless nights, the relatives, friends and strangers that laughed at you. Moments you questioned yourself-times you had nothing left; but still chose to believe. You held on when others folded. You stayed when it would of been easier to walk away. That makes you rare, dangerous and destined. “You may not feel it right now,” but this is THE FINAL STRETCH before everything changes. There will come a day when you sit in stillness and remember the version of you who refused to “Give Up.” The one who showed up broke, exhausted and ridiculed; but never let go of the vision. That day is coming—and when it does you will cry; not because you are hurting-because it all finally made sense. All the pain, doubt, delays and all the missed exits. It wasn’t punishment; It was preparation. You weren’t meant to get rich fast, You were meant to become someone “Unshakable.” You are awake,alive and know this matters. Now, you’re too far in to turn around and way too close to fold under pressure. The storm is loud but your intuition is louder and it’s been screaming from the beginning; “Hold On-Just Hold.” This moment is once in a lifetime, you won’t see it again. NOT LIKE THIS-NOT AT THIS PRICE-NOT WITH THIS SETUP. So breathe, trust your gut, Silence the noise and when this ends-when it finally ENDS-you’ll be the one they come to asking “HOW YOU KNEW?” And you’ll smile 🙂because deep down, way down; “YOU ALWAYS KNEW.” I’m proud of you, you’re almost there; Finish The Mission-I Love You.

Danielle knows a lot

45,378 views • 15 days ago

THE FINAL STRETCH BEFORE EVERYTHING CHANGES….💫🛸💫 💥Note to Anons- Patriots: You have been through more than you let on, more than anyone knows, the sleepless nights, the relatives, friends and strangers that laughed at you. Moments you questioned yourself-times you had nothing left; but still chose to believe. You held on when others folded. You stayed when it would of been easier to walk away. That makes you rare, dangerous and destined. “You may not feel it right now,” but this is THE FINAL STRETCH before everything changes. There will come a day when you sit in stillness and remember the version of you who refused to “Give Up.” The one who showed up broke, exhausted and ridiculed; but never let go of the vision. That day is coming—and when it does you will cry; not because you are hurting-because it all finally made sense. All the pain, doubt, delays and all the missed exits. It wasn’t punishment; It was preparation. You weren’t meant to get rich fast, You were meant to become someone “Unshakable.” You are awake,alive and know this matters. Now, you’re too far in to turn around and way too close to fold under pressure. The storm is loud but your intuition is louder and it’s been screaming from the beginning; “Hold On-Just Hold.” This moment is once in a lifetime, you won’t see it again. NOT LIKE THIS-NOT AT THIS PRICE-NOT WITH THIS SETUP. So breathe, trust your gut, Silence the noise and when this ends-when it finally ENDS-you’ll be the one they come to asking “HOW YOU KNEW?” And you’ll smile 🙂because deep down, way down; “YOU ALWAYS KNEW.” I’m proud of you, you’re almost there; Finish The Mission-I Love You.

John Fitzgerald Kennedy Jr

24,699 views • 2 days ago

I love your observation and it will make me discuss the remarkable adaptations that prevents giraffes from passing out and suffering brain damage when bending to drink water and when standing up. ADAPTATION 1 Did you know that the distance from the giraffe's heart to its brain is about 2 meters or more? That's more than the average humans height! Pumping blood up to that great distance and working against gravity is not a joke! That's where the giraffe's heart comes in. A giraffe's heart is unique in several ways. First, it is quite large, weighing up to 11kg and measuring about 2 feet long, which is necessary to pump blood up the long neck to the brain. Second, it has thick walls to generate enough pressure to overcome gravity and push the blood up to the head. ADAPTATION 2 Now, let's move to the neck. Before discussing the incredible roles the valves in the jugular veins perform, let's look at what can happen without them, and then the solution. Problem I: When the giraffe bends down to drink, blood rushes downward to the head. Gravity pulls a huge volume of blood toward the brain, which could cause dangerously high pressure in the head and potentially burst vessels or cause other damage. Solution: They have one-way valves in the jugular veins (the large veins in the neck). These prevent blood from rushing backward uncontrollably into the head when lowered. These valves help regulate and slow the downward flow, avoiding a massive pressure surge to the brain. Also, the neck veins can act as temporary blood storage unit, storing over 1 litre of blood. This prevents blood from flooding the brain and also reduces the amount of blood returning to the heart. As a result, the heart pumps with lower pressure while the head is lowered. This buffers the high head pressure that gravity would otherwise cause. Problem II: When they raise their head up immediately after drinking, blood pressure drops sharply to the brain. A sudden drop could starve the brain of oxygen, causing fainting. This is similar to but much more extreme than the dizziness some people feel when standing up quickly. Solution: When the giraffe raises its head, that stored blood rushes back to the heart quickly. The heart responds with a strong, high-pressure beat that immediately pushes blood back up to the brain, preventing a dangerous drop in cerebral pressure. Impressive right?!

Arojinle

33,422 views • 5 months ago