What did Kate McCann really see in the Children's Bedroom

[slartibartfast]

Even simple physics is all that is needed to answer the questions raised.

"Same here....you would have thought the door would have slammed when patio door opened

oR if not... because the door was open wider....why didn't she see the curtains open and the draft  3 mtr away."

Seeing is dependent on light and only once in the room did Kate become able to see into the low light intensity room.

Any slamming will be dependent on a gust of wind, and this could well have been of an intermittent nature as opposed to constantly blowing.

Needs an area of higher pressure and an area of lower pressure connected by an open passageway and a moveable door sufficiently closed to be affected by the airflow. IMO the bedroom door is a none starter as it opened the wrong way and would have only slammed when Kate opened the patio door and not after she closed the patio door.

[Robittybob1]

So if that was the case are you saying that the only gust of wind that night just happened to coincide with Kate's presence?

It would have coincided with one of the gusts that night. 
I am trying to think of analogy that is easier to visualise for we can't see air moving around a door.
Think of a river where it is deep and wide the current moves slowly but over narrowed portions it moves rapidly.
Same with a door in a breeze the rate of air velocity will increase as the door is closed.

[Robin Banks]

Why would you not believe it?

There are no other witnesses that saw the shutters up, apart from Gerry and Kate.  None of the Tapas crew mentions seeing the shutters up, but they do mention Gerry and Kate telling them the shutters were up.

 

[Robittybob1]

There are no other witnesses that saw the shutters up, apart from Gerry and Kate.  None of the Tapas crew mentions seeing the shutters up, but they do mention Gerry and Kate telling them the shutters were up.

So why do you discount what Amy Tierney says about the shutters being up?
http://www.mccannpjfiles.co.uk/PJ/AMY-ELLEN-TIERNEY.htm
"She confirms that, on the night of the disappearance she was on duty and immediately went to the bedroom to see if the girl was hiding. She saw that the shutter was raised and that the window was partially open. It was then that she began to look in the wardrobes to see if the girl was hiding."

[Robin Banks]

So why do you discount what Amy Tierney says about the shutters being up?
http://www.mccannpjfiles.co.uk/PJ/AMY-ELLEN-TIERNEY.htm
"She confirms that, on the night of the disappearance she was on duty and immediately went to the bedroom to see if the girl was hiding. She saw that the shutter was raised and that the window was partially open. It was then that she began to look in the wardrobes to see if the girl was hiding."

Yes, but time had passed.

Time to touch things, times to change things.

[Alice Purjorick]

It would have coincided with one of the gusts that night. 
I am trying to think of analogy that is easier to visualise for we can't see air moving around a door.
Think of a river where it is deep and wide the current moves slowly but over narrowed portions it moves rapidly.
Same with a door in a breeze the rate of air velocity will increase as the door is closed.

Only if the upstream pressure is increased accordingly or the flow rate reduces.

[Robittybob1]

Only if the upstream pressure is increased accordingly or the flow rate reduces.

If you can see the same effect caused by the river analogy I will agree with you entirely.   The narrow portion of the river constricts the flow until the pressure rises as the river level will rise and hence there is an increased drop in pressure (height) through the rapid section.

So as you closed the door the pressure in the room rises and hence the flow velocity  thorough the narrow portion will be faster (although the total amount of air will be less) than when the door was wide open.

[Alice Purjorick]

If you can see the same effect caused by the river analogy I will agree with you entirely.   The narrow portion of the river constricts the flow until the pressure rises the river level will rise and hence there is an increased drop through the rapid section.

So as you closed the door the pressure in the room rises and hence the flow velocity thorough the narrow portion will be faster than when the door was wide open.

If you would like to sketch it all up with some numbers chucked at it we will have a better appreciation of your point.
As described it would seem to fly in the face of Bernoulli's and Euler's ideas.

[Robittybob1]

If you would like to sketch it all up with some numbers chucked at it we will have a better appreciation of your point.
As described it would seem to fly in the face of Bernoulli's and Euler's ideas.

A link to Euler's ideas would be appreciated.
Bernoulli ideas show a lowered pressure perpendicular to the gas flow.  But that is unimportant for the door is held by the hinges from moving in the direction of that lowered pressure.

[Vertigo Swirl]

Perhaps someone can explain the science behind the fact that my bedroom door swung open and then swung closed again all night long, bedroom window open, as is the window in another room on the first floor?  Whatever it was, it was quite annoying!

[Robittybob1]

Perhaps someone can explain the science behind the fact that my bedroom door swung open and then swung closed again all night long, bedroom window open, as is the window in another room on the first floor?  Whatever it was, it was quite annoying!

You should have got up and either opened it a little further or closed it completely.

[Vertigo Swirl]

You should have got up and either opened it a little further or closed it completely.

I know but at the moment I am not very mobile so I left it.

[Robittybob1]

I know but at the moment I am not very mobile so I left it.

You  did tell us what the issue was.  Well  my cat got the hang of slamming doors shut to wake me in the morning so she would get her morning feed, so I hang something over the door so it doesn't slam shut anymore.

[Brietta]

You should have got up and either opened it a little further or closed it completely.

If you think about it doesn't that question and answer sort of sum up the science of it with regard to the air pressure thingy.

[Alice Purjorick]

Perhaps someone can explain the science behind the fact that my bedroom door swung open and then swung closed again all night long, bedroom window open, as is the window in another room on the first floor?  Whatever it was, it was quite annoying!

Simples:
Newton's First Law of Motion
Principles of Moments
Pressure always creating air movement from high pressure areas to low pressure areas.