Analysis of fluid retention zones in heat exchangers with segmental baffle and helical baffle.

(6) Species transport equation: HT <math overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mfrac><mo> </mo><mi>c</mi><mo> </mo><mi>t</mi></mfrac><mo>+</mo><msub><mi>u</mi><mi>i</mi></msub><mfrac><mo> </mo><mi>c</mi><mo> </mo><msub><mi>x</mi><mi>i</mi></msub></mfrac><mo>=</mo><mfrac><mo> </mo><mo> </mo><msub><mi>x</mi><mi>i</mi></msub></mfrac><mrow><mo>(</mo><mrow><mi> </mi><msub><mi>D</mi><mi>e</mi><mi>f</mi><mi>f</mi></msub><mfrac><mo> </mo><mi>c</mi><mo> </mo><msub><mi>x</mi><mi>i</mi></msub></mfrac></mrow><mo>)</mo></mrow></mrow></math> ht Graph (6)where I c i is the tracer concentration, mol/L; HT <math overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>D</mi><mi>e</mi><mi>f</mi><mi>f</mi></msub><mo>=</mo><mrow><msub><mi> </mi><mi>e</mi><mi>f</mi><mi>f</mi></msub><mo>/</mo><mi> </mi><msub><mi>S</mi><mi>c</mi></msub></mrow></mrow></math> ht is the effective diffusion coefficient, I D i SB I eff i sb is the effective viscosity coefficient, HT <math overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi> </mi><mi>e</mi><mi>f</mi><mi>f</mi></msub></mrow></math> ht and is the turbulent Schmidt number. Keywords: fluid retention zone; heat exchanger; helical flow; RTD EN fluid retention zone heat exchanger helical flow RTD 681 696 16 07/21/22 20220701 NES 220701 1 Introduction The shell and tube heat exchanger (STHX) is dominant in the heat exchanger equipments. [Extracted from the article]