We strive to develop use cases that reflect the everyday problems faced by engineers. Tell us how Knovel has helped you solve a problem and if your story is selected, you will be awarded a new iPad.

Relief valves protect pressure vessels and other equipment from being subjected to pressures that exceed their design limits. In this scenario, a bellows pressure relief (PR) valve needs to be sized in line with the mass flow rate for a gas pipeline with natural gas under critical flow conditions, i.e., when total superimposed pressure plus built-up back pressure is equal to or less than the critical flow pressure. An Engineer,…

The Space orbiter is the orbital spacecraft of the Space Shuttle program. This space-plane carries crews and payloads, performs on-orbit operations, then re-enters the atmosphere with crews and any on-board payload to the Earth. During an investigation of the vibration in the Space Orbiter, Raghavendra Rao, an aerospace engineer at a major aerospace and defense corporation, suspected that a structure located in the proximity of Main Engine Ignition (MEI) may…

The Lake Champlain Bridge spanned the state line between Crown Point, New York and Chimney Point, Vermont and has recently been demolished due to severe structural deterioration and unsafe conditions. The closure of this important transportation artery, its demolition, and the construction of a new bridge will cost taxpayers millions of dollars. Because of the high unplanned cost and concern for the safety of many bridges throughout the United States…

In this solution story, an Operations Manager at an electronics manufacturing company troubleshoots the root cause of a drop in yield using basic search and Knovel Math. Knovel Math provides fully documented Mathcad® worksheets for engineering calculations from trusted reference works, reducing the time it takes to find, solve and document equations. Let’s get started.

Selecting the diameter of a valve opening to optimize the mass flow of liquid acrylonitrile An engineer working for a chemical manufacturer is asked by his manager to find a way to optimize the flow rate of acrylonitrile, a key ingredient used in the manufacture of certain types of synthetic rubbers and fibers, from a tank. According to the process specification, acrylonitrile must flow from a tank at a rate…