This Forum is Closed
October 21, 2020, 03:20:22 am
Welcome, Guest. Please login or register.

Login with username, password and session length
News: GGF now has a permanent home:
  Home Help Search Links Staff List Login Register  

Let's Get it Right! 9/11 Dust Clouds NOT Pyroclastic Flows

Pages: [1]   Go Down
Author Topic: Let's Get it Right! 9/11 Dust Clouds NOT Pyroclastic Flows  (Read 342 times)
Bad Penny
Sr. Member
Offline Offline

Posts: 327

View Profile
« on: March 03, 2011, 02:53:46 am »

Bad Penny the physicist back again.

Our movement has frequently referred to the dust cloud emanating from the World Trade Center on 9/11 as a pyroclastic flow (actually pyroclastic density current).  Much has been made of the fact that the dust cloud flowed over the water after it reached the Hudson and East Rivers and New Your Harbo(u)r.  But a pyroclastic density current requires something beyond structural stability over water: it requires a specific mechanism enabling this structural stability.  That mechanism is tremendous heat which causes water to boil upon contact with the current, the resulting steam providing the support for the rock particles (which can include boulders!) to keep them airborne.

If you look carefully at the 9/11 videos, the dust cloud is the same height and shape whether over land or water, clearly indicating that we're observing pulverized concrete being supported in air by the fact that the tiny size of the particles renders them only slightly more dense than the air it's floating in.  (I also suspect, but cannot yet prove, that there's also a component of magnetic attraction/repulsion involved in holding the clouds together as they expanded.)

But my essential point is that a pyroclastic density current involves air hot enough to boil water upon contact: a "hot" PDC would incinerate a human upon contact, whereas a "cold" PDC would scald a human to death upon contact.  Such phenomena are not observed among those humans who physically contacted the moving dust cloud on 9/11.

What we do observe on 9/11 is concrete pulverized to the point that the particles float in the air like spilt flour, a certain sign of the destruction of the concrete by a pressure impulse far beyond the capability of stored gravitational potential energy.  In other worlds, the extent of the pulverization of the concrete is proof positive that the towers were blown up as opposed to simply collapsing.

But let's just stop calling it a pyroclastic density current.  It clearly wasn't.
Report Spam   Logged

Are you taking over?
Or are you taking orders?
I ain't going backwards!
We're going only forwards!

The Clash, White Riot

Share on Facebook Share on Twitter

Pages: [1]   Go Up
Jump to:  

Powered by EzPortal
Bookmark this site! | Upgrade This Forum
Free SMF Hosting - Create your own Forum

Powered by SMF | SMF © 2016, Simple Machines
Privacy Policy
Page created in 0.106 seconds with 16 queries.