ABE 6615
ADVANCED HEAT & MASS TRANSFER IN BIOLOGICAL SYSTEMS

  credits: 3
  prereq: CGS 3422 and AGE 3612C

Course Description:

Analytical and numerical technique solutions to problems of heat and mass transfer in biological systems. Emphasis on nonhomogeneous, irregularly-shaoed products with respiration and transpiration.

Instructor:

Khe Chau
Room 287 Rogers Hall
392-1864 x287
e-mail: kvc@ufl.edu

Grading:  
Homework ....... 30%
Midterm Exam .... 35%
Final Exam ...... 35%

REFERENCE MATERIALS

Luikov, A.V. Analytical Heat Diffusion Theory. Academic Press,
N.Y. 1968

Segerlind, L.J. Applied Finite Element Analysis. John Wiley and
Sons. 1976

Various technical papers

ANSYS Finite Elements Software Package

Syllabus:  
Topical Outline:

1. Review of analytical heat diffusion theory

- Fundamental Fourrier heat conduction law
- differential heat conduction equation
- solutions for semi-infinite body, plate, sphere, and
cylinder

2. Mass transfer

- Fick's law
- the Lewis relation
- simultaneous heat and mass transfer; enthalpy potential
- transpiration of fruits and vegetables
- effects of: vapor pressure deficit
air movement
respiration
size, shape
surface structure
- mathematical modeling
- procedures for measuring transpiration rates

3. Finite difference methods

- simulation of transient heat flow in non-homogeneous
biological materials of spherical shape (one dimensional),
irregular shape (multi-dimensional) under different
boundary conditions
- effect internal heat generation due to respiration
- effect of evaporative cooling
- effect of condensation

4. Cooling of bulk loads of fruits and vegetables

- methods
- computer simulation

5. Finite element analysis

- fundamentals of finite element method
- analyses using ANSYS software

6. Freezing of food products

- simplified equations
- migration isotherm method
- numerical simulation methods


7. Drying of agricultural products

- thin-layer equations
- the log model
- computer simulation of deep-bed drying

 

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Fax: (352) 392-4092

Agricultural and Biological Engineering Department
Frazier Rogers Hall, P.O.Box 110570
Gainesville, FL 32611-0570

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