Air Flow Visualization Articles & Analysis
18 articles found
Smoke studies are one of the best tools you have for deciding where your particle probes actually need to go. The problem is, after the fog clears and the videos get filed, translating what you saw into permanent probe placements can feel like guesswork. It doesn’t have to ...
For Cleanroom & Controlled Environment Air Flow Visualization Studies (AKA Smoke Studies). The purpose of performing Air Flow Visualization Studies is to accurately visualize the airflow patterns inside a Cleanroom or Controlled Environment. ...
ABSTRACT Airflow Visualization studies (AKA Smoke Studies) are used to evaluate air patterns in medical product cleanrooms and barrier systems (RABS, Isolators, pass-throughs and airlocks) that support aseptically produced, terminally sterilized and low bioburden product manufacturing.) These studies should be considered as more than a definitive pass/fail test. ...
When it comes to maintaining the integrity of cleanroom environments, human contamination remains the single greatest threat. In a recent webinar featuring Patricia Sitek, a leading biotechnologist and cleanroom consultant, and Jason Kelly, Director of Applications at Lighthouse, industry professionals gathered to discuss the critical role of personal hygiene and behavior in contamination ...
Higher occupancy levels typically necessitate greater ventilation rates to ensure sufficient air supply and prevent the accumulation of pollutants or stale air. ...
The following frequently asked questions arose at a presentation given by PMS Senior GMP Scientist, Mark Hallworth, on the 6th of December on the topic of EU GMP Annex 1 Air Speed Strategies for Unidirectional Flows. Why do manufacturers like ESCO, ThermoFisher Scientific, and Nuaire adopt different air speed values for 2A2 and 2B2 biological safety cabinets compared to the suggested range of ...
Maintaining a contamination-free environment is a prerequisite for high-tech manufacturing and scientific research. Cleanrooms are central to this endeavour. Although a cleanroom is a critical part of maintaining a working environment, they cannot guarantee required cleanliness standards without robust monitoring systems such as particle counters and air quality monitors. A cleanroom particle ...
The three-part test includes: • Measurements of face velocity • Air-flow visualization with digital collection • Tracer gas containment This process goes beyond strictly measuring the performance of a fume hood by its face velocity rating and also tests the fume hood’s ability to contain and exhaust fumes. ...
Asger Petersen from Denmark produce organic broilers with outdoor runs. Ventilation systems perform much alike during the mild period, but I saw significant differences during the colder/cold and the warm periods. Based on this, I found that a ventilation system from DACS would bring me the most. During winter the mixing of warm room air with incoming air is essential for the in-house climate and ...
ByDACS A/S
For manufacturers and fabricators in many industries, dealing with airborne particulates as byproducts of processes such as grinding, sanding, and coating is a significant safety and operational challenge. From dust settling on floors and products to potential long-term risks from worker exposure to respirable particulates, industrial manufacturers face an uphill battle with not only EHS ...
Abstract Keeping a contamination free environment in the laboratory has commonly been achieved by one of two ways: a flame or a biosafety cabinet (BSC). However, it has been frequently observed that the two practices have been combined, where a heat source has been used within the BSC. As flames require flammable gasses and cause hot air to rise, it was hypothesized that these could lead to a ...
ByBaker
The sensor mounting location within a space may be dependent on many variables. There are no specific formulas since each application will have it’s own determining factors and priorities. These include, but are not limited to: source of gas: Is the source a combustion exhaust from a vehicle or furnace or a vapour from a tank spill, pipe leak, or faulty valve? density of gas: some ...
An experimental and analytical method has been applied to evaluate air flow pattern in three main kinds of Iranian traditional wind catchers. Results indicate that ARDAKANI wind catcher with one opening is not an efficient device, and airflow average rate in its shaft is negative. It means that one-side wind catcher has a high rate air extract specially in summer and spring which air supply is ...
In this work, we carry out CFD-simulations of the Mock Urban Setting Test (MUST) case in the framework of the COST action 732. The main objective is to assess the quality assurance protocol and guidelines constructed in the COST action 732, and to study the role of the numerical truncation error as part of the total error. The computations are performed with a general flow solver FINFLO. The ...
This paper presents results from a numerical study which was conducted in order to investigate the effect of the flow around moving vehicles on the dispersion and the concentration of traffic emitted pollution within the Traforo Umberto road tunnel in the city centre of Rome. A series of three dimensional numerical transient simulations were performed using the commercial CFD code Ansys CFX 5.7.1 ...
Hygieneering’s Industrial Hygiene department recently responded to Indoor Air Quality concerns by occupants in a hospital following a localized fire within their building. The response including conducting air sampling for potential contaminants associated with the fire and an evaluation of remediation efforts. Recommendations were provided to change air flow patterns to better isolate ...
Many bridges are located at especially unfavourable places considering the local wind power and turbulence. Therefore it turns out that finding an optimal balance between structural safety and erection costs depends strongly on a proper wind modelling and investigation. Several aspects must be taken into account for the wind design. The effect of wind gusts and randomly distributed wind velocity ...
Transport of larger smoke particles generated by a fire in a compartment is studied. An atrium fire with three different heat release rates is taken as an example. The air flow pattern and temperature contours are predicted by a fire field (or application of computational fluid dynamics (CFD) model. The paths of smoke particles are modeled by the Lagrangian method coupled with the air movement ...