CFDを用いた人体周辺微気象解析による受動喫煙の研究

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タイトル別名
  • CFD ANALYSIS OF PASSIVE SMOKING BY MEANS OF MICRO CLIMATE AROUND THE HUMAN BODY
  • CFD オ モチイタ ジンタイ シュウヘン ビキショウ カイセキ ニ ヨル ジュドウ キツエン ノ ケンキュウ

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The purpose of the paper is to analyze passive-smoking in a room with 3-dimensional CFD analysis. We examine how much the breathing/inhalation air region is polluted by the smoke blown from a smoker's mouth or by the smoke arising from a lit cigarette. We evaluate the degree of pollution around the nose and mouth considering the indices of ventilation effectiveness. Displacement ventilation and mixing ventilation are tested as a ventilation system of the room. In the case of displacement ventilation, we examine two cases with the different speed of exhalation velocity. We observe that the thermal plume caused by the metabolic heat generation of the smoking person effectively transports both the cigarette smoke and blown smoke from the mouth upward and thereby the opposite-side person (passive smoking person) is not affected so much by the smoke. High-exposure case occurs only for the case with the high speed exhalation velocity and with the close distance between smoking and passive smoking person. On the other hand, in the case of mixing ventilation, the smoke tends to diffuse uniformly within the room regardless of the distance of the two persons.

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