Why fluid dynamics is important for COVID-19 research.

The impact of respiratory infections on humans has become the focus of attention !----The biggest defense against health crises is government policy, which is firmly rooted in scienceIn order to curb the spread of the disease, many Governments have implemented policies to prevent physical contactThis has a direct impact on our daily lives: the way people move, where they work, and how they interact with each other has changedThese policies are good first steps, but they are limited because they do not fully explain how viruses can be physically transmitted from person to personSome of the answers may exist in a field of research called fluid mechanics -- understanding how fluids moveUnderstanding how liquids flow helps us understand how viruses like COVID-19 spread between infected peopleThis is because when we cough or sneeze, the movement of the droplets we emit is controlled by the principles of fluid mechanicsUnderstanding how viruses spread can inform public health interventions to minimize riskRecent understandings of the interactions between fluid mechanics and epidemiology have begun to at least provide some insight into the physical transmission pathways of COVID-19For example, recent studies have shown that coughing or sneezing is made up of multiphase chaos gas cloudsThis gas cloud transports viral pathogens farther than expectedA growing body of evidence has led the World Health Organization (WHO) to admit that coronaviruses can be transmitted through tiny particles suspended in the airThe study of fluid mechanics is a discipline of how fluids moveIt sounds simple, but it's actually very complicatedFirst, it's important to understand what moving meansPhysicist Sir Isaac Newton has proved that something called force is necessary to change the way an object movesThis force must act on the object, and the size and direction of the force is the product of the mass and acceleration of the objectAcceleration refers to the change in the speed of an object over time (the rate of change in velocity)In addition, the speed of an object is the distance it takes over a certain period of timeTherefore, Newton's laws of motion can help us predict how objects travel through space-timeThis helps us calculate the position of the object at any given timeWe can apply Newton's laws of motion to fluids in an attempt to explain how fluids moveA fluid is a substance whose particles move a lot relative to a force that acts on itIn other words, the defining characteristic of a fluid is that the fluid is prone to deformationThe fluid has no fixed shapeAny liquid, such as water, is a good example, but the air around us can also be considered a fluidThe boundary between liquid and solid is not clear, and in some cases solids act like liquids if frozen, dried paint, and asphalt, and vice versaAn important feature of fluids is that they transport 'substances'; Therefore, the study of fluid mechanics is the basis for understanding the world in which we liveFor example, fluid mechanics can help us simulate and predict how the sun's heat travels around the world (think climate change)Another example is the application of fluid mechanics in the dissemination of respiratory diseases such as COVID-19Recent studies in the application of fluid mechanics to COVID-19 have shown that our current understanding of the routes of transmission of respiratory diseases is limited and is based on an oversimplified modelRecent developments in fluid mechanics and epidemiology suggest that turbulent air currents from sneezing or coughing transport pathogens farther than expected When we breathe, cough, or sneeze, the characteristics of the 'smoke bubble' or 'smoke plume' are important for understanding how droplets are transported The droplets inside the 'jet' are distorted by the complex airflow patterns associated with the jet or the 'plume' and their interaction with the surrounding air This process breaks down droplets into pieces and then falls out of the suspension, contaminating many surfaces Of course, the crushing process also produces small particles that move farther than large particles Flow field, temperature and humidity also affect the distance of motion of water droplets This has implications for the 1-2-meter (3-6-foot) body distance guidelines set by the World Health Organization Studies have shown that these droplets can fly up to 7 meters (20 feet) This does not take into account the presence of building ventilation systems, tiny droplets of water can be transported further afield In a recent open letter to WHO, more than 200 scientists accused WHO of underestimating the possibility of AIRBORNE COVID-19 transmission In the light of recent statements by the World Health Organization, these guidelines may be revised The principles of fluid mechanics have been used in ventilation design and occupational health, and our new understanding of fluid mechanics and epidemiology may help improve the ventilation system in buildings What we know may also inform government policy to reduce the spread of future pandemics such as COVID-19 DAVID K Source: End of cell !-- content presentation -- !-- determine stoate end.