Heat transfer Using Reynolds Analogy
Not what you're looking for?
A circuit board with a dense distribution of integrated circuits (ICs) and the
dimensions of 120mm by 120mm on a side is cooled by a parallel flow of atmospheric air with a velocity of 2 m/s.
From wind tunnel tests under the same flow conditions , the average frictional shear stress on the upper surface is determined to be 0.0625N/m^2. What is the allowable power dissipation from the upper surface of the board if the average surface temperature of the ICs must not exceed the ambient air by more than 25 degrees C ?
Answer given is---14.3 W
Purchase this Solution
Solution Summary
This solution determines the allowable power dissipation from the upper surface of the board assuming that the average surface temperature of the ICs cannot exceed the ambient air by more than 25 degrees C. All steps are shown with full formulas and brief explanations.
Solution Preview
Please see attachment.
Problem.
A circuit board with a dense distribution of integrated circuits (ICs) and the
dimensions of 120mm by 120mm on a side is cooled by a parallel flow of atmospheric air with a velocity of 2 m/s.
From wind tunnel tests under the same flow conditions, the average frictional shear stress on the upper surface is determined to be 0.0625N/m^2.
What is the allowable power dissipation from the upper surface of the board if the average surface temperature of the ICs must not exceed the ambient air by more than 25 degrees C ?
Solution:
According to the Newton's law, the shear at the wall (circuit board) is given by formula:
...
Purchase this Solution
Free BrainMass Quizzes
Basic Physics
This quiz will test your knowledge about basic Physics.
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.
The Moon
Test your knowledge of moon phases and movement.
Classical Mechanics
This quiz is designed to test and improve your knowledge on Classical Mechanics.
Introduction to Nanotechnology/Nanomaterials
This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.