CRTech Blog


August 30, 2021

Subtitle: Simulation vs. Design Analysis of OHPs

Brent Cullimore

In 1990, Hisateru Akachi showed in his patent that if you created flow circuits from a coiled, tiny-diameter loops, and filled them part way (say 30-70%) with a volatile working...

June 14, 2021

Jane Baumann

I like my cup of latte in the morning. However, I am too lazy to go to a local coffee shop and, being a typical frugal engineer, I am opposed to spending hundreds of dollars on a machine that will make espresso for my latte. Hence, a basic moka pot and a...

February 07, 2020

Brent Cullimore

Tiny Bubbles was a hit song by Don Ho (before even my time). Tiny Density Gradients just won’t make the charts.

But that’s what happens when you take a pure fluid substance to high enough pressure or temperature: the distinction between...

August 06, 2019

Brent Cullimore

You will of course remember this blog post from almost three years ago, “Why Stratified Tanks Stir Me Up.” I mean, who wouldn’t remember a complaint-ridden,...

December 23, 2018

Brent Cullimore

First, let’s be clear: I’m not addressing political dysfunction. If that was your first reaction upon seeing this title, then compromising itself has come to have a negative connotation.

I know it sounds better in engineering to call a...

August 14, 2018

Mark Schmidt

It began with a simple question: How difficult is it to make the <redacted name of a famous fictional armored vehicle made a long time ago in a studio far far away> walk correctly with...

June 25, 2018

Brent Cullimore

Thanks to fun headlines like “Geysers erupt because they’re all bendy inside,” this paper caught my...

May 21, 2018

This is the third post of a three-part blog on two-phase heat transport devices. It was supposed to be the final part, but if I get an inkling (and don’t retire first) perhaps I will continue with oscillating pipes or vapor chambers. If I do retire, it has been nice getting to know all of you...

March 11, 2018

Brent Cullimore

To say that Pythagoras, who lived over 2500 years ago, would be astounded by what I just did in his honor says nothing. I mean, let’s face it: he’d be astounded by kale chips, boomerangs, and tubas.

So I didn’t do it for him. I didn’t do it for...

November 03, 2017

Brent Cullimore

More than once, I got into an argument with a boss in the 80s. And I almost never had a boss who was a thermal engineer during that decade. They never knew what to do with us thermal people. Systems? Power? Materials? Propulsion? Avionics? Been...