Laboratory experiment of air residence time in a side rectangular cavity

Arif Widiatmojo, Kyuro Sasaki, Masanori Matsumura, Yuichi Sugai

Research output: Contribution to journalArticlepeer-review


Dispersion phenomena in underground mine ventilation system is an important parameter in controlling the spreading of gas or other particulate matter throughout the mine. From the results of tracer gas measurement in underground mine ventilation, it was found that the evaluated dispersion coefficient is larger than theoretical value. The presence of cavities and dead ends in along mine ventilation airways are supposed to be the main cause of this finding. The trapped gas inside cavity also harmful for workers, therefore adequate ventilation should be provided to dilute. In present study, the air residence time in a cavity was investigated by using tracer gas released in cavity and the decay time was measured required for the gas to completely escaped. The air exchange rates and the cavity’s ventilation efficiency were investigated in correlation with cavity’s aspect ratio and free stream velocity.
Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalAdvanced Chemical Engineering Research
Issue number1
Publication statusPublished - Jun 2014

All Science Journal Classification (ASJC) codes

  • Chemical Health and Safety
  • Fluid Flow and Transfer Processes


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