Prediction of the fluid flow, heat transfer and inactivation of microorganism at medical devices in modern steam sterilizers using computational fluid dynamics

Feurhuber, Manuel; Cattide, Antonello; Magno, Marino; Miranda, Marco; Prieler, René Josef; Hochenauer, Christoph

doi:10.1016/j.applthermaleng.2017.08.085

Cited by 22 publications

(16 citation statements)

References 19 publications

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“…Small volumes of 10 mm 10 mm 10 mm were defined in the numerical grid of the CFD model to compare the measured values with the simulated ones. The same results were found in a previous publication [6]. The temperature was measured with type J thermocouples.…”

Section: Boundary Conditionssupporting

confidence: 81%

“…All properties of both secondary phases were set to literature values [16,17]. In a previous study, the authors of the present work investigated different droplet diameters, and hardly any differences in the simulation results were found [6]. Many studies have investigated the droplet diameter of water in steam, which is very difficult to measure.…”

Section: Flow Modelingmentioning

confidence: 96%

“…The maximum skewness and maximum aspect ratio of the mesh were 0.8963 and 30.04, respectively. Additional mesh independency studies for steam sterilizers can be found in [6]. 4a.…”

Section: Numerical Gridmentioning

confidence: 99%

“…The real values of the volume fraction of the NCGs were calculated from the norm measurement with Eq. (6). The error rate of the NCG ratio according to the norm was determined to be ±5 %.…”

Section: Ratio Of Ncgs During the Sterilization Cyclementioning

confidence: 99%

“…The results show that the CFD-simulated volume fraction is in very good accordance with the real volume fraction, which was calculated with Eq. (6). The values of the NCG ratio according to the norm (Eq.…”

Section: Ratio Of Ncgs During the Sterilization Cyclementioning

confidence: 99%

See 4 more Smart Citations

CFD Investigation of Non‐Condensable Gases in Vacuum and Non‐Vacuum Steam Sterilizers

Feurhuber

Magno²,

Miranda³

et al. 2019

Chemie Ingenieur Technik

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Steam sterilization processes rely on high heat transfer rates from the steam to the medical devices. To guarantee this, all non-condensable gases (NCGs) must be removed from the steam sterilizer before sterilization. The ratios and distribution of the NCGs in the pre-sterilization phases of both a vacuum and a non-vacuum steam sterilizer are investigated. Two CFD models for simulation of the NCGs in the sterilizers were developed and validated by the measurements of a pressure sensor and eight thermocouples inside the steam sterilizer. Furthermore, a novel method was developed to calculate the real ratio of NCGs based on the standard measurement (EN 13060). The results show that the NCGs ratio defined in the EN 13060 did not accurately represent the real ratios of the NCGs.

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Section: Boundary Conditionssupporting

confidence: 81%

Section: Flow Modelingmentioning

confidence: 96%

“…The maximum skewness and maximum aspect ratio of the mesh were 0.8963 and 30.04, respectively. Additional mesh independency studies for steam sterilizers can be found in [6]. 4a.…”

Section: Numerical Gridmentioning

confidence: 99%

Section: Ratio Of Ncgs During the Sterilization Cyclementioning

confidence: 99%

Section: Ratio Of Ncgs During the Sterilization Cyclementioning

confidence: 99%

See 3 more Smart Citations

CFD Investigation of Non‐Condensable Gases in Vacuum and Non‐Vacuum Steam Sterilizers

Feurhuber

Magno²,

Miranda³

et al. 2019

Chemie Ingenieur Technik

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Numerical Investigation of the Heating Process of the Walls in Steam Sterilizers

Pletzer

Miranda²,

Lucchesi³

et al. 2022

Chemie Ingenieur Technik

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The basic principle of steam sterilization is based on high heat transfer rates from the steam to the medical device. In order to carry out this process as well as possible, the walls of the pressure chamber must be preheated. One way is to heat it with steam from the inside. To investigate this process, a three‐phase CFD model was developed, which can be used to determine the saturation temperature as a function of the partial pressure using a user‐defined function. For validation, the pressure, temperature (fluid and solid) and condensate content were measured. Results show that the model is excellently suited for predicting all relevant variables.

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CFD investigations of steam penetration, air-removal and condensation inside hollow loads and cavities

Feurhuber

Magno²,

Miranda³

et al. 2019

Applied Thermal Engineering

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Prediction of the fluid flow, heat transfer and inactivation of microorganism at medical devices in modern steam sterilizers using computational fluid dynamics

Cited by 22 publications

References 19 publications

CFD Investigation of Non‐Condensable Gases in Vacuum and Non‐Vacuum Steam Sterilizers

CFD Investigation of Non‐Condensable Gases in Vacuum and Non‐Vacuum Steam Sterilizers

Numerical Investigation of the Heating Process of the Walls in Steam Sterilizers

CFD investigations of steam penetration, air-removal and condensation inside hollow loads and cavities

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