1. Minimal contact open oxygen
delivery system

2. Introduction
 This work contains the CFD conceptual analysis for diffuser
cup .
 The purpose of this work is to examine the effects of the
breathing with oxygen diffuser cup.
 Simulation tests the rise of oxygen resulting from oxygen
diffuser cup .
 Oxygen flow from the diffuser cup is:0.01[L/s]

3. The Navier–Stokes Equations

4. Equations and Uniqueness
Conditions

5. Assumptions
 Not compressible flow.
 the no-slip condition for viscous fluids states that at a solid
boundary, the fluid will have zero velocity relative to the
boundary.
 Infinite rigid bodies

6. Environmental Conditions and
Assumptions
 The analysis was done in a steady state conditions.
 Ambient temperature: 20 oC
 Outlet pressure: 1 ATM
 breathing cycle:

7. Breathing gas mixture
inhalationexhalation
20%16.40%Oxygen
0.03%4.10%
Carbon
dioxide
79%75%Nitrogen
Insignificant
6%Water vapor

8. Mechanical Description

9. Simplified Model
oxygen
diffuser
cup

10. Material properties
UNITSVALUEProperties of AIR
(kg/mol)1.399Molecular mass

11. Material properties
UNITSVALUEProperties of Oxygen
(kg/mol)0.032Molecular mass

12. Material properties
UNITSVALUEProperties of Nitrogen
(kg/mol)1.3996Molecular mass

13. Material properties
UNITSVALUEProperties of Carbon dioxide
(kg/mol)0110.044Molecular mass

14. Mesh View
Computational mesh cells at
the solid/fluid interface.

15. Boundary Conditions
inhalation
Oxygen0.
0.01[l/s]
Gravity

16. velocity distribution
Inhalation velocity vector Exhalation velocity vector

17. Mass Fraction of Oxygen
Inhalation velocity vector Exhalation velocity vector

18. Mass Fraction of Oxygen 3D
display

19. Graph of breathing gas
components with diffuser

20. HEZI KONDERO
Numerical Solutions