What happens if fog comes on roads? First of all, visibility falls down, so the risk for a car accident increases, especially on highways. Scientists from Central Aerological Observatory have constructed a special electrostatic filter, which eliminates the fog at a distance up to 10 meters. The filter looks like a metal frame with a precipitation electrode - thin metal plates, separated with high-voltage isolators. It also has a corona-forming electrode of a twisted wire. The unit is grounded with a metal net.
Current fog dissipation methods are good only for cold fogs, which appear at temperatures below zero. Warm fogs are a bit worse: they are thermodynamically stable, and it requires much energy to dissipate them. There is a good method of electrostatic fog precipitation, used on factories: fog particles caught into electrostatic field between two electrodes - corona-forming and precipitation - acquire electrical charge (because of ionised air) and start moving towards the precipitation electrode. They stick to it and lose their charge.
The scientists tried to apply this method to open air. For testing purposes they created fog and then dissipated it under various weather conditions - on a sunny day with gradual temperature increase, or cloudy day with no temperature change, or in cold evenings. During these experiments, the scientists found the best electrodes shape and corona-forming voltage. So, electrostatic method takes 7 minutes for fog to disappear, while under natural conditions it takes nearly an hour.
Irina Sigunova | alfa
Laser rescue system for serious accidents
29.11.2016 | Laser Zentrum Hannover e.V.
Bremen University students reach the final at robotics competition with parcel delivery robot
19.10.2016 | BIBA - Bremer Institut für Produktion und Logistik
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
09.12.2016 | Life Sciences
09.12.2016 | Ecology, The Environment and Conservation
09.12.2016 | Health and Medicine