medical equipment-02

Minimal contact open oxygen delivery system

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]

The Navier–Stokes Equations

Equations and Uniqueness Conditions

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

Environmental Conditions and Assumptions

The analysis was done in a steady state conditions.

Ambient temperature: 20 oC

Outlet pressure: 1 ATM

breathing cycle:

Breathing gas mixture

inhalation exhalation

20% 16.40% Oxygen

0.03% 4.10% Carbon dioxide

79% 75% Nitrogen

Insignificant

6% Water vapor

Mechanical Description

Simplified Model

oxygen diffuser

cup

Material properties

UNITS VALUE Properties of AIR

(kg/mol) 1.399 Molecular mass

Material properties

UNITS VALUE Properties of Oxygen

(kg/mol) 0.032 Molecular mass

Material properties

UNITS VALUE Properties of Nitrogen

(kg/mol) 1.3996 Molecular mass

Material properties

UNITS VALUE Properties of Carbon dioxide

(kg/mol) 0110.044 Molecular mass

Mesh View

Computational mesh cells at

the solid/fluid interface.

Boundary Conditions

inhalation

Oxygen0.

0.01[l/s]

Gravity

velocity distribution

Inhalation velocity vector Exhalation velocity vector

Mass Fraction of Oxygen

Inhalation velocity vector Exhalation velocity vector

Mass Fraction of Oxygen 3D display

Graph of breathing gas components with diffuser

HEZI KONDERO

Numerical Solutions