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Virtual Flow
Simulation Hub
Face Mask with Venturi Valve- CFD Modeling
A study highlights airflow behaviour into the venturi respiratory masks. The mask design was made using the Opensource case data provided in Grab case:
https://grabcad.com/library/respirator-free-reanimation-venturi-s-valve-rev-4-1
The Study was made using openFOAM, a CFD open-source software to simulate the effect of attaching a Venturi Valve to Fase mask.
Sim. 1 : Flow inside Free Respirator Mask With Venturi's valve (40% design) at 0.522 L/min flow to the venturi (0.58 m/s inlet velocity) and preparation boundary conditions.
Sim. 2 : Characterizing the Flow Rate during the respiration process using Free Respirator Mask With Venturi's valve using #CFD. The simulation was made for 0.522 L/min flow to the venturi (0.58 m/s inlet velocity). A respiration simulated condition was added to the CFD simulation to determine the effect of inhaling and exhaling on the flow field. The full study and simulation were made using openFOAM can be downloaded directly from our website:
Using 12 L/min at the Venturi inlet, we recorded at the outlet of the mask (the end of the Venturi) an average increase of twice the inlet flow rate (around 30 L/min). The representation of the recorded flow rate at Sim. 3 shows that even during exhaling the flow rate at the Mask is holding to around 30 L/min.
Sim. 3 :Characterizing the High Flow Rate during the respiration process at 12 L/min inlet conditions.
Sim. 4 : Characterizing the High Flow Rate during the respiration process at 4.5 L/min inlet conditions.
COVID-19 Free Respirator Mask With Venturi's Valve
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