Research paper air / thermal flow / floor ...

[TooBee...]

I know the chances of anyone being able to help me on this is very small but...

I'm looking for a research paper that I read quite a few months ago (which I was certain that I had saved) that was about the differences in air flow and thermal effects of a curved (concave) floor (more like a tree cavity) and a more traditional flat floor in a beehive, like our man-made box hives
I've searched through my Bookmarks and trawled the net, but to no avail, hopefully this jogs someone's mind, or you have it.

 

[user 6228]

try

http://www.uoguelph.ca/canpolin/Publications/ThompsonCody_MSc2011_edited.pdf

 

[TooBee...]

try

http://www.uoguelph.ca/canpolin/Publications/ThompsonCody_MSc2011_edited.pdf

YES!
Thank you,
this is a much more fuller paper than the one I was thinking of

 

[charlievictorbravo]

try

http://www.uoguelph.ca/canpolin/Publications/ThompsonCody_MSc2011_edited.pdf

Derek - there are some pretty appalling errors in the bits of the paper I've read - e.g. Queens are generated from unfertilized eggs like the female workers, but are fed a special diet (para. 1.3.1) and as you're one of the few people on this forum who might follow the physics, I wondered what your view is of this paper. It seems to me that the writer did a lot of theoretical mathematics to establish air flow patterns but did not do any physical measurements to check his theories.

The research is based on the use of solid floors so the air flow patterns would be completely different with open mesh floors. Oh well.....


CVB

 

[linoleum bonypart]

Derek can you shed any light on floors ....omf v solid... have you any research

 

[user 6228]

Derek - there are some pretty appalling errors in the bits of the paper I've read - e.g. Queens are generated from unfertilized eggs like the female workers, but are fed a special diet (para. 1.3.1) and as you're one of the few people on this forum who might follow the physics, I wondered what your view is of this paper. It seems to me that the writer did a lot of theoretical mathematics to establish air flow patterns but did not do any physical measurements to check his theories.

The research is based on the use of solid floors so the air flow patterns would be completely different with open mesh floors. Oh well.....


CVB

This study is similar to
Sudarsan R, Thompson C, Kevan PG, Eberl HJ. 2012 Flow currents and ventilation in Langstroth beehives due to brood thermoregulation efforts of honeybees. J. Theor. Biol. 295, 168–193. (doi:10.1016/j.jtbi.2011.11.007)- no surprise its all the same authors
and like that it doesnt take account of heat loss through the hive walls i.e. it assumes a hive as a perfect insulator. There is no validation that is usually needed with such modelling.

I have done modelling of open mesh floors and it gets complicated involving the geometry of the varroa tray opening and the hydraulic resistance of the entrance.

My current research doesnt have good news for proponents of the open mesh floor, but for further details you will have to wait for it to be published.

As i said its complicated.

 

[Hivemaker.]

My current research doesnt have good news for proponents of the open mesh floor

Shhh..

 

[linoleum bonypart]

Says all i need to know thanks

 

[charlievictorbravo]

.

My current research doesn't have good news for proponents of the open mesh floor, but for further details you will have to wait for it to be published.

As i said its complicated.

Is that from a thermal regulation and air flow point of view or are you referring to its ability to separate the fallen mites from the bees?

CVB

 

[oliver90owner]

I expect that he will sy that more heat is lost through an OMF than a solid floor and that the OMF provides far more ventilation than the cluster requires.

There might be more about energy to channel air flows around the hive, too.

Won’t matter as I still believe OMFs are preferable (to a sealed base to the hive) for my 14 x 12 boxes. I’m not a propononent of over-wintering in just a single deep box.