If this is not possible, non-smokers should choose a ground floor apartment. Non-smokers are less likely to be bothered by neighboring smoke unless the building is completely enclosed. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How does smoke move in the air and how can one direct it?
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It takes about a year, with windows open, for smoke smell to outgas. It doesn't address any of the physics the OP is requesting.
Sign up or log in Sign up using Google. This is the wind that moves smoke out of an area and helps to disperse it in the atmosphere. However, it will generally not reach the mixing height. High intensity wildfires might. The smoke will spread out both horizontally and vertically as it moves down wind.
Wind speed usually increases with height. It is usually greatest in the afternoon. When transport winds are less than 9 mph, caution is indicated if smoke sensitive areas could be impacted.
Surface wind is measured at 20 feet in open areas, and is an indication of the wind that will affect the fire. Measurements are made at 20 feet to get away from the local changes at ground level, but still close enough to indicate the wind at the surface over a broad area.
The forestry forecast usually includes both morning and afternoon surface winds. Dispersion Index. The Dispersion Index is a numerical indicator of how well and how rapidly smoke will be dispersed.
It utilizes stability, mixing height, and transport wind as the major factors. Other factors are: the amount and angle of sunlight and temperature.
Most states include some type of dispersion or stagnation index in their weather forecast. Note: The decision to burn should not be based solely on the dispersion index.
Sky conditions are also part of a forestry forecast. These include:. Amount of cloud cover Hours of sunshine Visibility Drying potential The weather service determines visibility by whether or not known landmarks can be seen. Visibility of five miles or less is an indication of existing pollutants in the air. This fact should be carefully considered before adding to the concentration, especially where smoke-sensitive areas could be impacted by smoke from the burn.
Stability, mixing height, and transport winds are determined from measurements taken with a weather balloon. Although these measurements are taken regularly twice each day , only one or two measurements are made in each State.
Neither are they taken during the middle of the day. They are taken at am and pm in the southeast. All upper air measurements are taken at the same time world wide. Consequently, prescribed burners cannot blindly depend on the dispersion index alone. Look at the forecast mixing height, transport winds, and sky conditions. Observe the atmospheric conditions at the burn site as well.
Forestry Weather Forecasts. A forestry forecast is made by the National Weather Service and disseminated to the state forestry agencies and national forests. In turn, the states broadcast this forecast over the radio and it can be monitored on the designated frequency. Visibility would be zero.
He may not even see any flames because there would be so much smoke. If he was standing straight up as he entered the building, he would probably fall down unconscious in a matter of seconds because he would be inhaling that poisonous smoke.
Movie producers would run out of heroes quickly. In a fire, heat rises. Therefore, smoke rises. In the early stages of a structure fire, it is very common for smoke to accumulate near the ceiling. That is why smoke detectors are always placed high on a wall or ceiling. They detect the first signs of smoke, which rises to the top of the room. Firefighters know this and that is why, when they enter a burning building, they are down on their hands and knees.
There is far less smoke near the floor and the visibility is much better. In most cases, fire fatalities result from victims who have succumbed to smoke inhalation long before burn injuries occur. Eighty percent of those who die in residential fires have first inhaled smoke and other toxic gases.
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