March 2024:
As rains continue to fill local lakes and reservoirs,
onlookers are eagerly anticipating seeing the water of Napa County’s Lake Berryessa overflow into its funnel-like spillway, dubbed
“the Glory Hole,”
which channels water 200 feet straight down near Monticello Dam and into Putah Creek on the other side.
During these overflows, the water flowing into the hole looks like the drain of a giant bathtub, or a wormhole to another dimension.
For those…
Hi @…,
may https://developer.mozilla.org/en-US/observatory/analyze?host=qr.mro.name
really be failing beause it's
Noem, who’s in danger of being sacked, is trying to throw Stephen Miller under the bus. Meanwhile Miller is on TV trying to throw DHS under the bus. Basically they’re shitting their pants and flinging it at each other.
It’s working. Punch them harder.
https://fed.brid.gy/r/https://bsky.app/profile/did:plc:bbp2b224lro3bfnzcqwwnkfo/post/3mdgo4t4md22k
Large eddy simulation of turbulent swirl-stabilized flames using the front propagation formulation: impact of the resolved flame thickness
Ruochen Guo, Yunde Su, Yuewen Jiang
https://arxiv.org/abs/2602.21940 https://arxiv.org/pdf/2602.21940 https://arxiv.org/html/2602.21940
arXiv:2602.21940v1 Announce Type: new
Abstract: This work extends the front propagation formulation (FPF) combustion model to large eddy simulation (LES) of swirl-stabilized turbulent premixed flames and investigates the effects of resolved flame thickness on the predicted flame dynamics. The FPF method is designed to mitigate the spurious propagation of under-resolved flames while preserving the reaction characteristics of filtered flame fronts. In this study, the model is extended to account for non-adiabatic effects and is coupled with an improved sub-filter flame speed estimation that resolves the inconsistency arising from heat-release effects on local sub-filter turbulence. The performance of the extended FPF method is validated by LES of the TECFLAM swirl-stabilized burner, where the results agree well with experimental measurements. The simulations reveal that the stretching of vortical structures in the outer shear layer leads to the formation of trapped flame pockets, which are identified as the physical mechanism responsible for the secondary temperature peaks observed in the experiment. The prediction of this phenomenon is shown to be strongly dependent on the resolved flame thickness, when the filter size is used for modeling sub-filter flame wrinklings. Without proper modeling of the chemical steepening effects, the thickness of the resolved flame brush is over-predicted, causing the flame consumption rate to be under-estimated. Consequently, the flame brush detaches from the outer shear layer, resulting in a failure to capture the flame pockets and the associated secondary temperature peaks.
toXiv_bot_toot
The non-exodus of California billionaires
The media says they’re fleeing a wealth tax. Except, they’re not.
Nary a day has passed of late that hasn’t seen stories about the billionaires’ flight from California, lest they be subjected to a proposed wealth tax that hasn’t yet gathered the required signatures to qualify for the ballot. The fact that there is no billionaires’ flight from California hasn’t impeded the flow of such tales.
https://americanprospect.bluelena.io/index.php?action=social&chash=28f7241796510e838db4a1384ae1279d.3942&s=a25f328e944fec8e9462e7b6d554a892
I'm not ok. The world seems not ok. But community is important and there is still value in doing things just because. Blinky lights are fun, so last weekend I helped wire some controller boxes for an upcoming Burning Man project (maybe unscruz too?)
(and I've just realized that I don't know the project's name or if it has one...)
Conservatives want schools to teach this strict life path they say avoids poverty
The steps are simple: Graduate from high school. Find a full-time job. Get married before having kids.
The three-pronged framework is currently taught in just a handful of classrooms.
But soon, students across the country may be told that following those steps could keep them out of poverty as adults.
The approach is getting a boost from conservatives seeking to bring it to America’s middl…
As the Trump administration sows chaos with a crushing fuel blockade of Cuba,
a general told Congress that the military will
“set up a camp” at Guantšnamo Bay
to detain those who try to flee the humanitarian crisis inflicted by the United States.
…