Recent content by leka

**bigger then the ** , mistake corrected

Yes. I am only taking into account the two opposing walls because their surface is much bigger the the surface of other walls as well as they are close together.

Yep, I do know the temperatures of both opposing vertical walls. Any difference of temperature from 50 to 300 C will do. And the temperature range is from 20 to 350. thanks

What you are discribing is not possible. I am trying to determine Nu then h then Q lost due to natural convection. In the first post I think it is clear the set up of the problem and the variables. It si a rectangular enclosure. Temperature difference is between walls. thanks

Temperature difference between walls must be greater then 50 C and less then 300 C, and velocity I do not know. If I knew velocity then I can calculate Nu. Thanks.

Thanks, In my case I have to determine Nu based on geometry conditions and medium. I am using Nu to calculate h. I have about 4 different ways of determining Nu knowing RaL and Pr if certain condition are satisfied, but unfortunately my model does not satisfy one of the conditions on each of...

hi Everyone, I have a couple of books on heat transfer (Heat Transfer, A Practical Approach by Cengel and another one) but none of them contain any information on Nu number for vertical rectangular enclosures. I am trying to find convection coefficient (for free convection) and need Nu to...

Thanks to all for your elaboration in the matter.

The description of the photons as wave or particle is of little interest in this experiment. You can use one or the other or both to sustain an argument. The important questions raised; is there a critical point where: 1. No longer can add photons (able to fill the box). 2. Photons change...

Anyone else? I thought that this might spur some wild responses and speculations. Thanks

True that density does not impose any limits, but because of large number of photons there might be some interference between each other. Since photon is defined as wave and particle and in both concepts interference is a possibility that might as well happen in this case. But if so what kind...

Again do not look at how can we achive to do this experiment. I know that this is not possible to achieve today. I am more interested in the implication of this thought experiment. TIDE: Assume the photon source is inside of the enclosed space. KingNothing: Would they bounce forever if the...

I have come across this question in another forum and thought to post it here, hopefully will get some interesting views. This is a thought experiment so the setting might not be achivable with todays technology and knowledge, instead try to look at the implications of this set up rather then...

thanks for the info...

thanks for your help