Part 2 – Mechanical Engineers Recommend 7 Features on ‘New Age” Refrigerators

2019-09-13T15:18:49-07:00

Mechanical Engineers Update Tomorrow’s Refrigerator: Here are Your Choices  Black Board Models  Black board models are ideal for young families. Shopping list, school timetable and forthcoming doctors' appointments – all readily visible because they are stuck to the door of a refrigerator using fridge magnets. A black board fridge-freezer is a more stylish way of displaying your messages and reminders as you can write directly on the door using school chalk or liquid chalk markers. The black board material makes it easy to wipe away the writing.      2.    Glass [...]

Part 2 – Mechanical Engineers Recommend 7 Features on ‘New Age” Refrigerators2019-09-13T15:18:49-07:00

Mechanical Engineers Say Proper Ventilation is Crucial for Your Small Business

2019-09-13T15:19:52-07:00

Engineers Explain How Good Ventilation Helps Your Business We’ll start with a fact that often startles people: (indoor air quality is a major health threat in the country).  According to the U.S. Environmental Protection Agency, the air quality inside buildings is often 3 to 4 times worse than the air outside. This goes against what most people think air pollution is like— fumes from cars and smoke stacks casting dark clouds over cities.  Heavy wall insulation, tightly fitted, non-opening windows ( Window Efficiency ), and commercial synthetic carpeting in modern buildings allows for the [...]

Mechanical Engineers Say Proper Ventilation is Crucial for Your Small Business2019-09-13T15:19:52-07:00

Mechanical Engineers Recommend Home Drainage – Winter Months are Coming !

2019-09-13T15:20:19-07:00

How Do Engineers Handle Rainwater? Engineers can help with proper fitting of gutters, or eaves troughs as they are called in some parts of the country. They are an important part of the drainage system around your house.  If yours are nonexistent, in poor condition, or improperly placed on your house, they could be causing problems and putting your home at risk of water damage. Gutters need to be installed properly so that they catch the water coming off your roof and channel it away from your house and its foundation. [...]

Mechanical Engineers Recommend Home Drainage – Winter Months are Coming !2019-09-13T15:20:19-07:00

Engineers Develop Ways to Ventilate Your Home

2019-09-13T15:28:43-07:00

Why ventilate? For centuries homes weren’t ventilated, and they did all right, didn’t they? Why do we need to go to all this effort (and often considerable expense) to ventilate houses today?  Engineers have developed several reasons that ventilation is more important today than it was long ago. Most importantly, houses 100 years ago were leaky. Usually they didn’t have insulation in the walls, so fresh air could easily enter through all the gaps, cracks, and holes in the building envelope., the building materials used 100 years ago were mostly natural [...]

Engineers Develop Ways to Ventilate Your Home2019-09-13T15:28:43-07:00

Hydrogen Fuel Cells for Cars

2019-09-13T15:21:17-07:00

Up and Coming Hydrogen Fuel Cells for Automotive Use If you haven’t heard about hydrogen and fuel cells before, then now is your chance. These technologies are bursting on to the scene and can solve some of the biggest problems in energy ranging from commercial buildings to transportation. While most people are more familiar with solar, wind and battery power, keep your eye on these up-and-coming technologies that could add to our nation’s diverse energy mix. Here Are A Few Things to Know About Hydrogen and Fuel Cells. Electric cars can [...]

Hydrogen Fuel Cells for Cars2019-09-13T15:21:17-07:00

Flat Panel and LCD Screens: Part 1

2019-09-13T14:56:16-07:00

Liquid crystal display (LCD) screens are omnipresent in our technologically saturated lives.  Having largely displaced the older CRT screens, LCDs make up a large portion of the digital imaging we see all around us.  They are present in everything from our ubiquitous smartphones and computer screens to digital billboards, wristwatches and vehicle and aircraft instrumentation.  How do flat panel LCD screens work? One can often find videos and articles documenting eager teardowns of new devices, but few delve beyond the hardware and into the materials and design behind the screen itself.  For this series of [...]

Flat Panel and LCD Screens: Part 12019-09-13T14:56:16-07:00

Wind Load CFD Modeling for Rooftop Elements Compared to ASCE 7

2018-02-20T11:28:46-08:00

  Wind Load Comparison between CFD and ASCE 7 for Rooftop shapes Welcome back to our blog series on the phenomenon called Wind Load CFD Modeling and how it affects civil and mechanical engineers.  Wind Load is the force that blowing wind exerts on any device or structure that extends above ground level.  After an initial introduction to the factors that affect wind load on an object, I compared three different sets of wind load calculation methods using three simple objects, hypothetically placed on a 100-foot-tall building.  Starting with generic drag equation [...]

Wind Load CFD Modeling for Rooftop Elements Compared to ASCE 72018-02-20T11:28:46-08:00

Wind Load Calculations and Modeling

2018-02-20T12:26:27-08:00

 Part 1 of our Wind Load Series “Wind load” is a calculated value representing the total force on a structure or object cause by pressure from wind moving over it.  In this blog series, we will discuss different methods for wind load calculations, the factors that influence its magnitude, and the effects a high wind load can have on a structure.  Wind load is most commonly addressed by civil and structural engineers when designing buildings, but mechanical engineers can encounter the effect when designing tall objects like cranes, telescoping communications masts or [...]

Wind Load Calculations and Modeling2018-02-20T12:26:27-08:00

Flat Panel and LCD Screens, Part 2

2018-02-22T10:23:01-08:00

Figure 1: Unpowered Sony Ericsson S500i LCD screen at 200x magnification In our last blog post, I wrote about some of the physics and materials science principles that go into the design and manufacture of liquid-crystal display (LCD) screens.  The eponymous liquid crystals (LCs) in such a display have to be quite small in order to create a seamless image; as I mentioned in the last entry, the subpixels (the red, green and blue elements comprising a pixel, visible in Figure 1) can be smaller than a red blood [...]

Flat Panel and LCD Screens, Part 22018-02-22T10:23:01-08:00

Layered Composite Heaters for Semiconductor Processing

2018-02-20T12:34:14-08:00

Figure 1: Composite layered heater from patent  US 9,224,626 B2 Alexander Glew, Ph.D., P.E. recently contributed to a new patent on an advanced thin-film electric heaters, layered composite heaters, for CVD semiconductor processing and related technologies titled “Composite substrate for layered heaters”.  Watlow Electric, based in St. Louis, hired Glew Engineering and Dr. Glew to help develop this heater technology due to his experience in the Silicon Valley’s semiconductor industry.  As a semiconductor equipment expert and materials engineering consultant, Dr. Glew’s familiarity with semiconductor manufacturing meant he understood both the limitations of common [...]

Layered Composite Heaters for Semiconductor Processing2018-02-20T12:34:14-08:00

Thermal Expansion in a Glass and Aluminum Window: Part 2

2018-02-20T13:29:14-08:00

Figure 1: Simplified model of an aluminum-glass window   In last week’s blog, Thermal Expansion in a Glass and Aluminum Window: Part 1, we introduced the basic concept of thermal expansion in solid materials.  Since CTE mismatch can impose extremely high stress, during mechanical engineering design one must consider the temperature exposure and expansion or contraction of a material.  In order to help the read gain insight, we used a simplified aluminum-framed window to demonstrate that a hot summer day would be enough to shatter glass [...]

Thermal Expansion in a Glass and Aluminum Window: Part 22018-02-20T13:29:14-08:00

Thermal Expansion in a Glass and Aluminum Window: Part 1

2018-02-21T10:38:23-08:00

Equipment designers must accommodate thermal expansion (CTE)of dissimilar materials, especially when they are subject to large temperature changes.  This problem is often called "CTE mismatch."  In this blog, we give the fundamentals of thermal expansion calculations used in thermo-mechanical analysis. These calculations are simple but useful, and easy enough to perform by hand or with a spread sheet. For more complicated shapes, one must use computer modeling.  As an example, we perform a finite element analysis (FEA) in a later blog http://glewengineering.com/thermal-expansion-in-a-glass-and-aluminum-window-part-2/, of a glass and aluminum window [...]

Thermal Expansion in a Glass and Aluminum Window: Part 12018-02-21T10:38:23-08:00

Italian Masters: Galileo’s Stellar Science and Engineering

2018-02-21T10:55:17-08:00

Portrait of Galileo Galilei Justus Sustermans [Public domain], via Wikimedia Commons I’d like to return to our previous series on the Italian Masters, focused not on the usual masters or painting and sculpture but on the masters or science, mathematics, and engineering.  So far in the series I’ve written about the accomplishments of Volta, Cassini, Venturi and Torricelli.  Today, I’d like to look at one of the greats: Galileo Galilei.  Galileo is most famous today for standing up for heliocentrism against the Catholic Church and spending the last [...]

Italian Masters: Galileo’s Stellar Science and Engineering2018-02-21T10:55:17-08:00

Italian Masters: Volta Jump-Starts Electrical Engineering

2017-11-07T16:51:43-08:00

Figure 1: Allesandro Volta We’ve been taking a break from hard-hitting mechanical engineering and materials science blogs with some pieces on the Italian masters of science, mathematics and engineering in the 16-19th centuries.  I’ve previously explored the lives and contributions of Evangelista Torricelli, Giovanni Venturi and Giovanni Cassini.  For this blog, I’m focusing on Alessandro Volta, who helped revolutionize our understanding of electricity and electrochemstry it in the late 18th century.  […]

Italian Masters: Volta Jump-Starts Electrical Engineering2017-11-07T16:51:43-08:00

12 Years a Martian: Mechanical Engineering on Mars, The Red Planet

2018-04-10T16:24:41-07:00

Figure 1: Mars Exploration Rover mobility testing By NASA

12 Years a Martian: Mechanical Engineering on Mars, The Red Planet2018-04-10T16:24:41-07:00

12 Years a Martian: Materials Science on the Red Planet

2017-11-09T10:25:54-08:00

Figure 1: Diagram of the scientific equipment on MER-B Opportunity Mars Exploration Rover Launches Press Kit, June 2003, p. 41 [i] I mentioned in a blog last week that Mars Exploration Rover B (FIgure 1), more affectionately called Opportunity, recently celebrated the 12th anniversary (in Earth years) of its landing on Mars.  12 years without maintenance on the hostile surface of another planet is incredible, considering the original operational time was planned for only 3 months.  Mars Science Laboratory Curiosity currently gets the most press, with its larger tool [...]

12 Years a Martian: Materials Science on the Red Planet2017-11-09T10:25:54-08:00

12 Years a Martian: Engineering Challenges on the Red Planet

2019-09-12T14:35:47-07:00

Figure 1: Mars Exploration Rover By NASA/JPL/Cornell University, Maas Digital LLC [Public domain], via Wikimedia Commons Depending on which Facebook pages or Twitter feeds you follow, some of you may have caught wind that Opportunity (Mars Exploration Rover B, Figure 1) recently passed its twelfth anniversary of its landing on the red planet.  Opportunity’s ongoing trek across Mars represents a fantastic accomplishment in engineering.  At the time I’m writing this, the rover has been in continual operation for over 4,300 Earth days (that’s about 4,185 Sols, or [...]

12 Years a Martian: Engineering Challenges on the Red Planet2019-09-12T14:35:47-07:00

Materials Science News: 2-D Phosphorus-The Future for Solar Cells?

2018-08-07T14:16:50-07:00

Materials science research shows that 2-dimensional phosphorus could be the future for the semiconductor industry.

Materials Science News: 2-D Phosphorus-The Future for Solar Cells?2018-08-07T14:16:50-07:00