Does Capillary Diameter Affect Flow Rate Stability in a Decreasing Vacuum?

AI Thread Summary
The discussion focuses on the evacuation of a cannister using a vacuum pump, operating within a vacuum range of 200-900 mbar. It questions whether the flow rate remains constant as the vacuum decreases over 24 hours or if it tails off at a certain pressure, specifically using a capillary with a diameter of 0.102 mm. The pressure in the cannister is noted to decrease exponentially, indicating that flow rates may not remain constant throughout the evacuation process. Understanding this exponential relationship is crucial for predicting evacuation behavior over time. The insights provided can help in optimizing the vacuum evacuation process.
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we vacate a cannister using a vacuum pump using a range from 200-900 mbar of vaccum. Will the flow rate remain constant as the vacuum decreases over 24 hrs or does it tail off at a given pressure, a capillary of diameter 0.102mm is used ?
 
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