Gas Flow Rate
Gas Flow Rate - Related Videos
13:35
Mass Conservation and Flow Rate Measurements
0 Views •
2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The purpose of this experiment is to demonstrate the calibration of a flow passage as a flowmeter using a control volume (CV) formulation [1, 2]. The CV analysis focuses on the macroscopic effect of flow on engineering systems, rather than the detailed description that could be achieved with a detailed differential analysis. These two techniques should be...
07:51
Gas Absorber
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Gas absorbers are used to remove contaminants from gas streams. Multiple designs are used to accomplish this objective1. A packed bed column uses gas and liquid streams running counter to each other in a column packed with loose packing materials, such as ceramics, metals, and plastics, or structured packing1. The packed bed uses surface area created by the packing to...
10:34
Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow
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Cited by 5 •
2014
Stable radicals that are present in carbon substrates interact with paramagnetic oxygen through a Heisenberg spin exchange. This interaction can be significantly reduced under STP conditions by flowing a diamagnetic gas over the carbon system. This manuscript describes a simple method to characterize the nature of those radicals.
02:48
Zebrafish Rheotaxis Assay: A Method for Measuring Orientation Behavior in Response to Different Water Flow Rates
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2023
This video describes the rheotaxis assay in zebrafish. The method involves the measurement of orientation behavior of zebrafish in response to different water flow rates under the influence of different magnetic fields.
08:21
Permeabilization of Adhered Cells Using an Inert Gas Jet
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Cited by 3 •
2013
This protocol describes a method for the temporary permeabilization of adherent cells using an inert gas jet. This technique facilitates the transfer of genetic material and biomolecules into adherent mammalian cells by the utilization of mechanical forces to disrupt the plasma membrane.
FAQs
Choosing between volumetric and mass flow rate depends on what the engineering calculation must represent. Volumetric flow describes gas volume under stated conditions, whereas mass flow tracks the amount of gas independent of that volume expression. Because pressure, temperature, and gas properties affect volume, engineers must specify operating conditions when comparing measurements or designing equipment.
Pressure and temperature are not merely reporting details; they can change the measured value of gas flow rate. A gas stream may show a different volumetric result when its operating conditions change, even when the same gas is involved. Engineers therefore interpret readings alongside pressure, temperature, gas properties, and flow conditions rather than treating one value as universal.
Measurement devices rely on different physical responses. A rotameter responds to changes related to gas velocity, an orifice plate uses a pressure-related effect, and a mass flow controller uses a thermal response while also regulating the stream. Selecting among them depends on whether the task is to determine flow, control it, or support a specific operating condition.
A practical selection begins by identifying whether the system needs measurement, regulation, or both. Engineers then consider gas properties, pressure and temperature conditions, flow behavior, and the instrument's role in the equipment. Rotameters and orifice plates can determine flow, while mass flow controllers can regulate it, making selection part of system design rather than an isolated decision.
Gas flow rate enters equipment design by linking required gas movement to the capacity of pipelines, compressors, ventilation systems, and chemical-processing equipment. Engineers use the relevant flow expression together with operating conditions to size or configure these systems. Matching the specified rate to actual conditions helps support process stability, efficient operation, emissions management, and safe performance.
Accurate control of gas flow rate supports several engineering goals at once. Stable flow helps maintain process stability, while appropriate control can improve energy efficiency and contribute to emissions management. In systems where gas movement affects operating conditions, dependable measurement or regulation also supports safe operation and provides a basis for meeting changing process requirements.