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10.1016/j.ijid.2020.07.066 http://scihub22266oqcxt.onion/10.1016/j.ijid.2020.07.066 32861829!7452831!32861829     free     free     free Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Int+J+Infect+Dis 2020 ; 99 (ä): 505-513 Nephropedia Template TP {{tp|p=32861829|t=2020. A fluid mechanics explanation of the effectiveness of common materials for respiratory masks |pdf=|usr=}}{{32861829}} gab.com Text A fluid mechanics explanation of the effectiveness of common materials for respiratory masks JO: Int J Infect Dis http://www.kidney.de/pget.php?&tw=1&pmid=32861829 #FOAvip OBJECTIVES: Face masks are an important component of personal protection equipment employed in preventing the spread of diseases such as COVID-19. As the supply of mass-produced masks has decreased, the use of homemade masks has become more prevalent. It is important to quantify the effectiveness of different types of materials to provide useful information, which should be considered for homemade masks. METHODS: Filtration effects of different types of common materials were studied by measuring the aerosol droplet concentrations in the upstream and downstream regions. Flow-field characteristics of surrounding regions of tested materials were investigated using a laser-diagnostics technique, i.e., particle image velocimetry. The pressure difference across the tested materials was measured. RESULTS: Measured aerosol concentrations indicated a breakup of large-size particles into smaller particles. Tested materials had higher filtration efficiency for large particles. Single-layer materials were less efficient, but they had a low pressure-drop. Multilayer materials could produce greater filtering efficiency with an increased pressure drop, which is an indicator of comfort level and breathability. The obtained flow-fields indicated a flow disruption downstream of the tested materials as the velocity magnitude noticeably decreased. CONCLUSIONS: The obtained results provide an insight into flow-field characteristics and filtration efficiency of different types of household materials commonly used for homemade masks. This study allows comparison with mass-produced masks under consistent test conditions while employing several well-established techniques. Twit Text FOAVip A fluid mechanics explanation of the effectiveness of common materials for respiratory masks ????Int J Infect Dis http://www.kidney.de/pget.php?&tw=1&pmid=32861829 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=32861829 #FOAvip English Wikipedia <ref>{{Cite pmid|32861829}}</ref> A fluid mechanics explanation of the effectiveness of common materials for respiratory masks #MMPMID32861829 Maher B; Chavez R; Tomaz GCQ; Nguyen T; Hassan Y Int J Infect Dis 2020[Oct]; 99 (ä): 505-513 PMID32861829show ga OBJECTIVES: Face masks are an important component of personal protection equipment employed in preventing the spread of diseases such as COVID-19. As the supply of mass-produced masks has decreased, the use of homemade masks has become more prevalent. It is important to quantify the effectiveness of different types of materials to provide useful information, which should be considered for homemade masks. METHODS: Filtration effects of different types of common materials were studied by measuring the aerosol droplet concentrations in the upstream and downstream regions. Flow-field characteristics of surrounding regions of tested materials were investigated using a laser-diagnostics technique, i.e., particle image velocimetry. The pressure difference across the tested materials was measured. RESULTS: Measured aerosol concentrations indicated a breakup of large-size particles into smaller particles. Tested materials had higher filtration efficiency for large particles. Single-layer materials were less efficient, but they had a low pressure-drop. Multilayer materials could produce greater filtering efficiency with an increased pressure drop, which is an indicator of comfort level and breathability. The obtained flow-fields indicated a flow disruption downstream of the tested materials as the velocity magnitude noticeably decreased. CONCLUSIONS: The obtained results provide an insight into flow-field characteristics and filtration efficiency of different types of household materials commonly used for homemade masks. This study allows comparison with mass-produced masks under consistent test conditions while employing several well-established techniques. |*Filtration/instrumentation[MESH] |*Masks[MESH] |*Materials Testing/methods[MESH] |*Textiles[MESH] |Aerosols[MESH] |Betacoronavirus[MESH] |COVID-19[MESH] |Coronavirus Infections/*prevention & control[MESH] |Humans[MESH] |Pandemics/*prevention & control[MESH] |Particle Size[MESH] |Pneumonia, Viral/*prevention & control[MESH]A fluid mechanics explanation of the effectiveness of common materials(epmc).pdf DeepDyve Pubget Overpricing