| The total Catering and Food Service is experiencing a continuous updraught, and this was clearly noticeable on all days of the fair. |
| In microgravity there is no updraught and so a flame assumes a diffuse spherical shape around the combustion source. |
| Occasionally, with clashing air currents inside the cumulus cloud, a serious downdraught is thrust by an even more serious updraught. |
| And there is evidence of an updraught in the USA, Russia and Europe. |
| The rotation occurs due to interactions between the updraught of the plume and horizontal wind patterns. |
| Once a fire starts, the heat attracts an updraught, and the hotter the fire gets the more oxygen-rich air is sucked through the deck to feed it. |
