Navier-Stokes video fun,  Emriver shipping, Em4.

Navier-Stokes video fun, Emriver shipping, Em4.

We had a busy Friday at LRRD. We’re hard at work on the Em4, and got an exciting and very expensive shipment of exotic materials for it. Jesse and Cara worked on shipping alternatives for the Emriver. We’re being asked to ship them to far places. At the...

Our frustrating and fun work at LRRD.

Our frustrating and fun work at LRRD.

Two Emriver models arrived via Fedex frieght 48 hours after shipping, clients surprised. Good work, LRRD. We worked on a device codenamed “Geo-bong,” and added a couple of destroyed pumps to the pump graveyard. More Emriver design modification, shown here....

Stratigraphy, black bean soup, and hawks.

Stratigraphy, black bean soup, and hawks.

Drawing on my hundreds of hours of undergrad student labor analyzing soil samples using the Bouyoucos method, I put our experimental color-coded plastic media into a 2.25 inch cylinder and inverted it, tried pumping in air (not good, bubbles stick to the particles),...

Little plastic particles, big rivers.

Little plastic particles, big rivers.

The plastic media we use for the Emriver model comes from post-industrial recyclers. It’s used as an abrasive to do things like take paint off airplanes. Getting it in certain colors, or color-coded by size, was a joke to them. Like asking for only the Budweiser...

Hot grad students in ergonomic Em4 hot tubs.  Not.

Hot grad students in ergonomic Em4 hot tubs. Not.

The building was filled with smoke as I arrived this morning. Jesse was fixing our Goodwill 1970’s office chairs with his wire welder. Without gloves, I see. We worked on em4 ergonomics, here with a 1:5 model. Probably a reservoir low and big enough to...