Uniformly distributed floor sources of buoyancy can give rise to significant spatial inhomogeneities within rooms

Displacement ventilation, where cool external air enters a room through low-level vents and warmer leaves high-level vents, is characterised by vertical gradients in pressure arising from the indoor temperatures. Models usually assume that horizontal variations of temperature difference are small comparison are, therefore, unimportant. Small-scale laboratory experiments computational fluid dynamics were used to examine these flows, driven uniformly heated floor. These simulations show can be neglected for predictions bulk ventilation rate; however, they also evidence significant play critical role establishing pattern flow within – this renders position low- (relative one another) important. We consider two cases: single-ended (where inlet outlet at same end room) opposite-ended. In both cases rate same. However, opposite-ended case dead zone established upper part which results variations. formation examining streamline patterns age room. discuss implications occupant exposure pollutants airborne disease.