# Numerical analysis of partially heated vertical parallel plates in natural convective cooling

## Abstract

Natural convection heat transfer in vertical parallel-plate channels has been thoroughly investigated in the last few years inasmuch as this configuration plays a major role in contemporary cooling applications in industry, e.g., electronic components, ventilation systems, and solar installations. This paper addresses the significance of adding insulated extensions to a parallel-plate channel in which the plates receive a uniform heat flux and a natural convection airflow is responsible for the cooling. The wall temperatures may decrease or increase, depending on whether the channel extensions are appended at the inlet or at the exit of the channel. The full elliptic conservation equations are solved numerically in an I-type composite computational domain. For the two cases treated, the pertinent results are reported in terms of wall temperature profiles, induced mass flow rates, and pressure profiles. The insulated extension placed downstream of the heated part implies a reduction of the maximum wall temperature. This effect is less relevant as the Rayleigh number increases. In addition, correlations have been obtained between the induced mass flow rate as well as the maximum wall temperatures and the Rayleigh number and the extension ratio in the investigated range of parameters.

- Authors:

- Idaho State Univ., Pocatello, ID (United States). Coll. of Engineering
- Seconda Univ. di Napoli, Aversa (Italy). Dipt. di Ingegneria Aerospaciale

- Publication Date:

- OSTI Identifier:
- 687451

- Resource Type:
- Journal Article

- Journal Name:
- Numerical Heat Transfer. Part A, Applications

- Additional Journal Information:
- Journal Volume: 36; Journal Issue: 2; Other Information: PBD: 13 Aug 1999

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; NUMERICAL ANALYSIS; NATURAL CONVECTION; COOLING; PLATES; THERMAL INSULATION

### Citation Formats

```
Campo, A., Manca, O., and Morrone, B.
```*Numerical analysis of partially heated vertical parallel plates in natural convective cooling*. United States: N. p., 1999.
Web.

```
Campo, A., Manca, O., & Morrone, B.
```*Numerical analysis of partially heated vertical parallel plates in natural convective cooling*. United States.

```
Campo, A., Manca, O., and Morrone, B. Fri .
"Numerical analysis of partially heated vertical parallel plates in natural convective cooling". United States.
```

```
@article{osti_687451,
```

title = {Numerical analysis of partially heated vertical parallel plates in natural convective cooling},

author = {Campo, A. and Manca, O. and Morrone, B.},

abstractNote = {Natural convection heat transfer in vertical parallel-plate channels has been thoroughly investigated in the last few years inasmuch as this configuration plays a major role in contemporary cooling applications in industry, e.g., electronic components, ventilation systems, and solar installations. This paper addresses the significance of adding insulated extensions to a parallel-plate channel in which the plates receive a uniform heat flux and a natural convection airflow is responsible for the cooling. The wall temperatures may decrease or increase, depending on whether the channel extensions are appended at the inlet or at the exit of the channel. The full elliptic conservation equations are solved numerically in an I-type composite computational domain. For the two cases treated, the pertinent results are reported in terms of wall temperature profiles, induced mass flow rates, and pressure profiles. The insulated extension placed downstream of the heated part implies a reduction of the maximum wall temperature. This effect is less relevant as the Rayleigh number increases. In addition, correlations have been obtained between the induced mass flow rate as well as the maximum wall temperatures and the Rayleigh number and the extension ratio in the investigated range of parameters.},

doi = {},

journal = {Numerical Heat Transfer. Part A, Applications},

number = 2,

volume = 36,

place = {United States},

year = {1999},

month = {8}

}