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ESTS0650 PIPE-ESTSC.

PIPE-ESTSC, Friction Factor for 3-D Turbulent Flow in Rough Tubes

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1. NAME OR DESIGNATION OF PROGRAM:  PIPE-ESTSC.
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2. COMPUTERS
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Program name Package id Status Status date
PIPE-ESTSC ESTS0650/01 Arrived 24-JAN-2002

Machines used:

Package ID Orig. computer Test computer
ESTS0650/01 IBM PC
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3. DESCRIPTION OF PROGRAM OR FUNCTION

Three-dimensional roughened internally enhanced tubes have been shown to be one of the most energy efficient for turbulent, forced convection applications. However, there is only one prediction method presented in the open literature and that is restricted to three-dimensional sand-grain roughness. Other roughness types are being proposed: hemispherical sectors, truncated cones, and full and truncated pyramids. There are no validated heat-transfer and friction-factor prediction methods for these different roughness shapes that can be used in the transition and fully rough region. This program calculates the Nusselt number and friction factor values, for a broad range of three-dimensional roughness types such as hemispherical sectors, truncated cones, and full and truncated pyramids. Users of this program are heat-exchangers designers, enhanced tubing suppliers, and research organizations or academia who are developing or validating prediction methods.
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4. METHOD OF SOLUTION

PIPE obtains solutions of a modified form of the momentum and energy equations using an implicit finite difference method. These modified forms on the momentum and energy equations contain contributions from the roughness elements and also from the unaltered portion of the pipe.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Cannot be used for all types of three-dimensional spiral-rib roughness configurations.
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6. TYPICAL RUNNING TIME:  About 10 seconds on 386 type machine.
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7. UNUSUAL FEATURES OF THE PROGRAM

Throughout the code, attempts were made to use variable names that were close facsimiles of the symbols in the mathematical development in the text. $DECLARE and $STRICT commands of Microsoft FORTRAN were used that force the compiler to obey strict FORTRAN 77 standards for easing portability. The input is interactive and output is self-explanatory.
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8. RELATED AND AUXILIARY PROGRAMS

PIPE is used for cone and truncated cone shapes. Another version called PIPES is used for hemispherical  sectors. The difference in the two programs is one subroutine.
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9. STATUS
Package ID Status date Status
ESTS0650/01 24-JAN-2002 Masterfiled Arrived
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10. REFERENCES:
ESTS0650/01, included references:
- R.P. Taylor and B.K. Hodge:
  Validated Heat-Transfer and Pressure-Drop Prediction Methods
  Based on the Discrete Element Method: Phase I, Three-Dimensional
  Roughness
  ANL-ESD-TM-31 (February 1992)
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11. MACHINE REQUIREMENTS:  PC computer.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
ESTS0650/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  MS-DOS.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

    R.P. Taylor and B.K. Hodge
    Mississippi State University, MS (United States)
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16. MATERIAL AVAILABLE
ESTS0650/01
source program   mag tapePIPE.FOR Source code                       SRCTP
load module      mag tapePIPE.EXE Executable file                   LODTP
test-case data   mag tapeFLOW.DAT Input file                        DATTP
report                   ANL/ESD/TM-31 (February 1992)              REPPT
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17. CATEGORIES
  • H. Heat Transfer and Fluid Flow

Keywords: heat transfer, tubes, turbulent flow.