Direct numerical simulation of synthetic jet coupled to forced convection cooling in a channel flow

Name: Direct numerical simulation of synthetic jet coupled to forced convection cooling in a channel flow
Author: Azarifar, M., Arık, Mehmet

İsim	Direct numerical simulation of synthetic jet coupled to forced convection cooling in a channel flow
Yazar	Azarifar, M., Arık, Mehmet
Basım Tarihi:	2023
Basım Yeri	- IEEE
Konu	Direct numerical simulation, Electronics cooling, Heat transfer, Instability, Synthetic jets, Vortex ring
Tür	Belge
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	979-835032166-1
Kayıt Numarası	67df6f75-a392-4103-8b2a-82db9262cf99
Lokasyon	Mechanical Engineering
Tarih	2023
Notlar	Auburn University Samuel Ginn College of Engineering
Örnek Metin	A synthetic jet (SJ) is a microfluidic device that uses the 'zero-net-mass-flux' concept to create a compact cooling solution and provide a net positive momentum flux to the local environment. SJs have been studied extensively for natural convection heat transfer, but there is a limited data available for SJs in cross flow regimes. This paper presents results based on direct numerical simulation of a SJ in a confined heat transfer channel with and without cross flow. Studied SJ had a deforming boundary that oscillated at 1000 Hz and was placed at a high orifice-to-plate distance ratio of 20. The flow field inside the device with a moving boundary was modeled in a coupled manner to the flow field outside of the device for 80 oscillation cycles. The coupled study of the flow fields inside and outside of the cavity revealed their interaction towards an unstable flow field. Moreover, comparison between SJ's and continuous jet's (CJ) cooling performance was performed with the same net mass flow rate and identical jet outlet temperatures. Without cross flow, CJ, and with cross flow, SJ outperformed in terms of heat removal. The remarkable difference in spatial evolution of CJ and SJ explains the better performance of SJ in cross flow regime. In the studied high orifice-to-plate distance, CJ stream was unable to penetrate effectively through the crossflow, while the vortical structures created by SJ were able to do so and impinge on the target surface with heat transfer augmentation at upstream. Furthermore, the SJ's cavity heating was found to be a limiting factor in its capability to achieve high heat transfer coefficients in confined channels, which needs to be addressed to maintain its reliable heat removal performance.
DOI	10.1109/ITherm55368.2023.10177569

Kaynağa git Özyeğin Üniversitesi

Aramaya Dön

Özyeğin Üniversitesi

Kaynağa git

Direct numerical simulation of synthetic jet coupled to forced convection cooling in a channel flow

Yazar Azarifar, M., Arık, Mehmet

Basım Tarihi 2023

Basım Yeri - IEEE

Konu Direct numerical simulation, Electronics cooling, Heat transfer, Instability, Synthetic jets, Vortex ring

Tür Belge

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 979-835032166-1

Kayıt Numarası 67df6f75-a392-4103-8b2a-82db9262cf99

Lokasyon Mechanical Engineering

Tarih 2023

Notlar Auburn University Samuel Ginn College of Engineering

Örnek Metin A synthetic jet (SJ) is a microfluidic device that uses the 'zero-net-mass-flux' concept to create a compact cooling solution and provide a net positive momentum flux to the local environment. SJs have been studied extensively for natural convection heat transfer, but there is a limited data available for SJs in cross flow regimes. This paper presents results based on direct numerical simulation of a SJ in a confined heat transfer channel with and without cross flow. Studied SJ had a deforming boundary that oscillated at 1000 Hz and was placed at a high orifice-to-plate distance ratio of 20. The flow field inside the device with a moving boundary was modeled in a coupled manner to the flow field outside of the device for 80 oscillation cycles. The coupled study of the flow fields inside and outside of the cavity revealed their interaction towards an unstable flow field. Moreover, comparison between SJ's and continuous jet's (CJ) cooling performance was performed with the same net mass flow rate and identical jet outlet temperatures. Without cross flow, CJ, and with cross flow, SJ outperformed in terms of heat removal. The remarkable difference in spatial evolution of CJ and SJ explains the better performance of SJ in cross flow regime. In the studied high orifice-to-plate distance, CJ stream was unable to penetrate effectively through the crossflow, while the vortical structures created by SJ were able to do so and impinge on the target surface with heat transfer augmentation at upstream. Furthermore, the SJ's cavity heating was found to be a limiting factor in its capability to achieve high heat transfer coefficients in confined channels, which needs to be addressed to maintain its reliable heat removal performance.

DOI 10.1109/ITherm55368.2023.10177569