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There are all kinds of strange effects in physics, some are counter-intuitive, some are widely used physical laws, and among them is the Maragoni effect.
In life, this effect generally does not attract our attention, but once it comes to some specific scenes, the Maragoni effect will show its "anti-sky" ability.
Peeing in a bucket of boiling water is a very dangerous act, and there is a Maragoni effect in it, which causes urine to flow upstream, causing the danger of burns.
So what is the Maragoni effect?
How does urine cause fluid reflux?
1. The emergence of the Maragoni effect.
The so-called Maragoni effect refers to the phenomenon of a tensile effect caused by the temperature difference between two liquids, which causes the liquid to swim upstream.
The Maragoni effect occurs due to the different tensions of two liquids at different temperatures, which in turn triggers the force of one liquid on the other, causing the liquid to swim upstream.
The tension of a liquid is closely related to temperature, and the formula for tension is: T=1-α (T-T0).
where t is the tension between the two liquids, α is a constant, usually between 10-3-10-2, T0 is the temperature of the two liquids, and T is its tension.
It can be seen from the formula that when the temperature difference between the two liquids is larger, the tension is greater and the tension is less.
In life, this effect usually appears in the treatment of oily water, and the Maragoni effect can effectively improve the cleaning efficiency of oily water, thereby protecting the environment.
However, in daily life, this effect is not very common, but once it comes to certain scenarios, this effect will show its "anti-nature" ability, such as urinating in a bucket of boiling water, causing fluid reflux.
2. Why urine can cause fluid reflux.
Although the Maragoni effect is not common in life, once we learn about it, we can be alert to some potential dangers.
For example, when you pee in a bucket of boiling water, there is a danger that the temperature of the urine is not equal to the temperature of the boiling water in the bucket, which will cause the liquid to flow backwards and eventually burn yourself.
A study in mainland China shows that every year, many people pee because of a bucket of boiling water, causing urine to flow outside and burn themselves, or urine rebounds to their bodies, causing burns.
Is it true that urine causes fluid reflux?
There are some imprecise places in this statement, but there is some truth in it, which involves the Maragoni effect.
The Malagoni effect is caused by the temperature difference between liquids, which causes the phenomenon of counterflow, which includes the tension of liquids, which is also related to the contact angle between liquids.
The contact angle is the angle formed by the contact surface between a droplet and another liquid, and the tension of the liquid is affected by this contact angle, which causes the phenomenon of liquid counterflow.
But what is the reason for the extremely low chance of urine triggering fluid reflux?
3. The possibility of urine causing fluid reflux is extremely low.
The possibility of reflux in urine is extremely low, but it is not impossible, and different types of urine can cause reflux, including urine at different temperatures.
However, the probability of urine causing fluid reflux is extremely low, and there are two reasons for this, one is that there is a limit value for the Maragoni effect, when the temperature difference exceeds this range, the liquid will stratify, and urine will not cause liquid reflux.
Another reason is the limitation of the human body's physiological structure, the temperature of the human urine is usually between 35-38°C, and this temperature does not cause the fluid to reflux, thus burning itself.
If there is a large difference between the temperature of the urine and the temperature of the boiling water in the bucket, then the physiology of the human body will automatically help cool the urine, thus reducing the possibility of fluid reflux.
In addition, the angle of the reverse flow of the liquid also has an effect on this effect, and the Malagoni effect also causes the reverse flow of the liquid, so the angle of the reverse flow also has an effect when the urine causes the reverse flow of the liquid.
It is not impossible for urine to cause a reflux of fluid, but it is definitely not possible for urine to flow backwards onto the buttocks and cause burns.
Fourth, temperature neutralization.
In fact, the temperature neutralization effect will also have an impact on temperature transfer, which means that the temperature of two liquids is very different, and this temperature difference will trigger a large amount of heat transfer, so that the temperature of the two liquids gradually converges.
In fact, there is a relationship between tension and temperature neutralization, and the tension is proportional to the temperature difference, thus forming a negative feedback, when the temperature difference is large, the tension will also increase, and then cause the liquid to flow back.
But over time, the tension also decreases, and eventually the temperature between the two liquids is gradually neutralized, so that the tension plateaus.
Therefore, the relationship between tension and temperature is a negative feedback relationship and a dynamic process, and the tension cannot always exist between the temperature difference and will eventually be counteracted by the process of temperature neutralization.
Therefore, it is impossible for urine to cause burns, one of the reasons for this is the process of temperature neutralization, the temperature of urine is quite different from the temperature of boiling water in the bucket, and the physiological structure of the human body will also help the urine to cool down, so the possibility of fluid reflux is extremely low.
5. Application of the Maragoni effect.
Although the Maragoni effect is not very common in life, it has a very wide range of applications in the process of sewage discharge and production, and the Maragoni effect can effectively improve the cleaning efficiency of oily water.
One of them is the use of the Maragoni effect, oil and water are two different liquids, their density and tension are different, thus forming a stratification phenomenon, the Maragoni effect can effectively reduce this stratification phenomenon, so as to improve the cleaning efficiency of oily sewage and protect the environment.
Therefore, the Maragoni effect has a very wide application in sewage discharge, which is also a widely used physical law, and we can solve some environmental problems through this physical law.
In addition, the Maragoni effect has other applications, in the production process, there is a temperature difference between the liquids, which can effectively increase the flow speed of the liquid, thus improving the production efficiency.
epilogue
The Maragoni effect has other applications in the production process, and we can use this physical law to improve production efficiency and maximize the use of resources.
Therefore, we need to know more about the laws of physics, which is very helpful for our life and work.
At the same time, the laws of physics are also very rigorous, so let's not confuse them with rumors, which will not only mislead others, but also cause some safety accidents.