THE EFFECT OF FIN ANGLE ON INCREASING THE HEAT TRANSFER FROM ELECTRONIC COMPONENTS BY APPLYING AN IMPINGING JET-CROSS FLOW

Alnak D. E., Karabulut K.

ISPEC INTERNATIONAL CONGRESS ON MULTIDISCIPLINARY STUDIES, Adana, Türkiye, 12 Kasım 2021, sa.1, ss.621-635

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Adana
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.621-635
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

With the advancement of technology, circuit elements in developing electronic devices heat

up and their temperatures rise depending on the working load. Cross flow, which is one of the

methods used to increase heat transfer from electronic circuits, may be insufficient for cooling

circuit elements that have reached very high temperatures. The temperature is kept within safe

limits by providing an efficient heat transfer from the circuit elements with the impinging jetcross

flow application. In this study, heat transfer from rectangular shaped surfaces with

copper plate with constant heat flux of 1000 W/m2 in the channel was investigated

numerically by using a combination of impinging jet and cross flow. Numerical research was

carried out by solving the energy and Navier-Stokes equations as three dimensional and

steady, using the Ansys-Fluent computer program with k-ε turbulence model. In order to

direct the flow in the channel to the heated surfaces, the fins with 30o, 45o and 60o angles and

the length of the D jet inlet diameter were placed in the channel horizontally with the

impinging jet surface. The jet fluid used in the channel is water, and the upper and lower

surfaces of the channel and the fin are adiabatic. The distance between the jet and the plate is

45 mm (3Dh), and the jet Reynolds number range is 5000-9000. The results of the study were

compared with the experimental results of the study in the literature and they were found to be

consistent with each other. The results were presented as the mean Nu number and surface

temperature variation for each rectangular patterned surface. Besides, the velocity-streamline

and temperature contour distributions of the impinging jet-cross flow along the channel for

channels were evaluated comparatively. For Re = 9000, it was determined that the average Nu

number value in the channel with 60o fin angle was 20.02% higher than the channel without

fin.