Author: Frank P. Incropera. downloads Views 57MB Size Report. DOWNLOAD PDF Fundamentals of Momentum, Heat and Mass Transfer. Fundamentals Of Heat And Mass Transfer Incropera Pdf File. echecs16.info Incropera FP and Dewitt DP, Fundamentals of Heat and Mass. Transfer, Fifth edition, John Wiley and Sons, Cengel YA, Heat and Mass Transfer - A.
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Fundamentals of Heat and Mass. Transfer. FRANK P. INCROPERA. College of Engineering. University of Notre Dame. DAVID P. DEWITT. School of Mechanical . Fundamentals of Heat and Mass Transfer 7th Edition Incropera dewitt. 宝 李. This page intentionally left blank echecs16.info 2/21/11 PM Page i. by Frank P. Incropera · heat and mass echecs16.info Beautiful Boy Fundamentals of Momentum, Heat and Mass Transfer, 5th Edition.
What I have to say in this post is pretty fundamental to interpreting the output of model runs from MODTRAN, as well as to understanding its relationship to models of the greenhouse effect including feedback. Radiation measures There are four quantities used to quantify radiation which are related to one another and which use standard symbols in most texts: radiant intensity I , irradiance G , emitted power E or W , and radiosity J. I used Is for solar irradiance in my previous post, but I will stick to the conventional symbols from now on. The definitions of these are: Intensity is the power flowing along a pencil of rays from or toward a unit area on a surface and delimited by a unit solid angle in some direction. It is what we would think of as a beam of radiation. Irradiance is intensity integrated over the entire view that a unit surface area has of incoming radiation. It is the power flux landing on a surface.
Note the range of potential input values, and the raw model output button.
Having an unfettered input to MODTRAN would allow a person to calculate radiant intensity at a number of view angles, and integrate over a hemisphere. Imagine being high in the atmosphere, 70 km above the surface, and looking down. The view is not of Earth covering the entire hemisphere, but rather includes cold, dark space at grazing angles. Despite this, difference between models can be much more accurate as long as one takes care in specifying the model.
A final point about the wrapper concerns the temperature offset it allows. Each of the model atmospheres has a default surface temperature; By specifying an offset, though, one actually adjusts the entire atmospheric path by this offset value, and is not what one intends to do in most circumstances.
It would be great if one could just adjust temperature of the boundary layer, or just the surface, but this is not possible in any easy manner. Finally, there are two assumptions regarding water vapor that a user can choose—constant relative humidity or constant mixing ratio.
The constant relative humidity choice has an interesting interaction with a negative temperature offset.
Look at the raw model file. Caveat emptor!
The only difference is CO2 concentrations—ppm versus ppm. In various places he states different values, and he applies different assumptions, and considers different end points.
Calculation of the Greenhouse Forcing CO2. Get help on Mechanical Engineering with Chegg Study.
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