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110年 - 110 國立清華大學碩士班考試入學試題_化學工程學系:輸送現象及單元操作#104976
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Problem 2
Answer the following questions regarding the fundamentals of energy transport.
(a) Provide the definitions of forced convection and natural (free) convection.
相關申論題
(b) Give the definitions s and physical meanings of PrandtI number (Pr), Nusselt number (Nu), and Grashof number (Gr).
#445246
(c) What are the important dimensionless groups governing the Nusselt number in forced convection?
#445247
(a) What are the partial differential equations that must be satisfied by Eq. (1) and (2)?
#445248
(b) Write down the boundary conditions that apply at r = R.
#445249
(c) Show that Ti and To satisfy their respective partial differential equations in (a).
#445250
(d) Show that Eqs. (1) and (2) satisfy the boundary conditions in (b).
#445251
(a) Calculate the membrane coefficient,.
#445252
(b) Calculate the overall mass transfer coefficient, K and the percent resistance of membrane.
#445253
(c) Calculate the flux, (kg mol/m2-s). The area required (m2) for'a transfer rate of 0.001 kg mol of A/s.
#445254
(d) By increasing the mixing intensity of both liquid phases, we manage to increase the mass coefficients to double their current values. What will be the percent increase in NA?
#445255
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110年 - 110 國立清華大學碩士班考試入學試題_化學工程學系:輸送現象及單元操作#104976
110年 · #104976
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