SpinOffs

A blog on what's new, notable, and next in turbomachinery

Posts about thermodynamics

Entropy Happens… Deal with It!

Entropy Happens… Deal with It!

By Francis A. Di Bella, P.E.
Jul 19, 2019

If there’s one thing good about sitting in snarled traffic in Boston, it’s that you get to see some very original bumper stickers. The most recent bumper sticker I saw was probably the strangest one,...

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In Thermodynamics: “What Goes Around-Comes Around” is a Good Thing

In Thermodynamics: “What Goes Around-Comes Around” is a Good Thing

By Francis A. Di Bella, P.E.
Jun 28, 2019

When discussing the efficiency of transforming one form of energy to another, circularity is the way to go. Anyone who has spent even a little time studying engineering thermodynamics knows that the...

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The Ultimate Fluid Model: Non-Equilibrium Modeling

The Ultimate Fluid Model: Non-Equilibrium Modeling

By Mark R. Anderson
May 24, 2019

In this blog series, I covered a lot of thermo-fluid options in engineering analysis, from the simplest perfect gas (When Perfect is Good Enough – Perfect Gas Models) and ideal liquid, (Fluid...

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Going Through a Phase – Modeling Phase Change with Cubics

Going Through a Phase – Modeling Phase Change with Cubics

By Mark R. Anderson
Apr 26, 2019

When fluids undergo a phase change (see Phase Change - Make Mine a Double), it typically has a very significant effect of the flow behavior and energy level of the system.  Some examples of this are:...

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What do Undergraduates, a Chimney, Renewable Energy and an Open Pit Mine Have in Common?

What do Undergraduates, a Chimney, Renewable Energy and an Open Pit Mine Have in Common?

By Francis A. Di Bella, P.E.
Apr 19, 2019

It sounds like an opening to a joke, but I wanted to share some creative thinking sparked during a field trip to a local gas turbine cogeneration plant with some undergraduate students I teach. The...

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What's Better than Perfect? Semi-Perfect Gas Models

What's Better than Perfect? Semi-Perfect Gas Models

By Mark R. Anderson
Mar 8, 2019

In a previous blog, Fluid Phenomena Primer: Energy Versus Temperature, Specific Heat, I explained the behavior for gas phase fluids and how the temperature is affected at high energy levels.  In...

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Phase Change - Make Mine a Double!

Phase Change - Make Mine a Double!

By Mark R. Anderson
Feb 22, 2019

As I’ve always said, there’s as much thermodynamics in a glass of beer, as there is in a power plant. Don't believe me? Read on. Phase change is common phenomena that we see all the time.  We’re most...

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When Perfect is Good Enough - Perfect Gas Models

When Perfect is Good Enough - Perfect Gas Models

By Mark R. Anderson
Feb 15, 2019

What is a perfect gas? A perfect gas is one that has a linear variation in energy with respect to temperature and a linear variation in pressure with respect to temperature at constant volume. The...

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Fluid Phenomena Primer: Energy Versus Temperature, Specific Heat

Fluid Phenomena Primer: Energy Versus Temperature, Specific Heat

By Mark R. Anderson
Feb 8, 2019

As one might expect, the temperature of a substance typically increases as energy is added to it. This is the case with most substances in all phases. The exception is when a substance crosses to a...

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