Infinite square tube

Square Contact Area on Square Flux Tube. Mikic and Rohsenow [65] reported the solution for an isoflux square contact area on the end of a semi-infinite square flux tube. The solution was recast [74] to give the dimensionless spreading resistance ... 

B. C-J. Chen, T. H. Chien, W. T. Sha, and J. H. Kim, Solution of Flow in an Infinite Square Array of Circular Tubes by Using Boundary Fitted Coordinate Systems, Numerical Grid Generation, ed. J. F. Thompson, Elsevier, New York, pp. 619-632,1982. 

C, respectively, and the emissivities of A and B are 0,90 and 0.25, respectively. Both surfaces are gray, (a) Surfaces A and B are infinite parallel planes 3 m apart, (b) Surface is a spherical shell 3 m in diameter, and surface. S is a similar shell concentric with A and 0,3 m in diameter, (c) Surfaces A and B are fiat parallel squares 2 by 2 m, one exactly above the other, 2 m apart, (d) Surfaces A and B are concentric cylindrical tubes with diameters of 300 and 275 mm, respectively, (e) Surface A is an infinite plane, and surface B is an infinite row of lOO-mm-OD tubes set on 200-mm centers. (/) Same as (e) except that 200 mm above the centerlines of the tubes is another infinite plane having an emissivity of 0,90, which does not transmit any of the energy incident upon it. (g) Same as /) except that surface. 6 is a double row of lOO-mm-OD tubes set on equilateral 200-mm centers. 

Two vessels, capacity and t>2, are filled with the same gas but at different pressures p and p2 respectively. Assume that the vessels are connected by a capillary tube and that the quantity of gas which flows from one vessel to the other is proportional to the difference in the squares of the pressures in v 2am the two vessels, and to the time. What are the pressures, x1 Fig. 153. and a 2, in each vessel at the end of t seconds (Lorentz.) The quantity of gas, dQ, which flows through the capillary during the infinitely small interval of time dt is by hypothesis... 

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