Author: Sadık Kakaç
Publisher: Springer
ISBN:
Category : Heat exchangers
Languages : en
Pages : 1032
Book Description
Low Reynolds Number Flow Heat Exchangers
Author: Sadık Kakaç
Publisher: Springer
ISBN:
Category : Heat exchangers
Languages : en
Pages : 1032
Book Description
Publisher: Springer
ISBN:
Category : Heat exchangers
Languages : en
Pages : 1032
Book Description
Low Reynolds Number Flow Heat Exchangers. Proceedings of the 4. NATO ASI on Heat Transfer, Ankara 1981
Author:
Publisher:
ISBN: 9780891162544
Category :
Languages : en
Pages : 1016
Book Description
Publisher:
ISBN: 9780891162544
Category :
Languages : en
Pages : 1016
Book Description
Low Reynolds Number Flow Heat Exchangers
Author:
Publisher:
ISBN: 9780891162544
Category : Heat exchangers
Languages : en
Pages :
Book Description
Publisher:
ISBN: 9780891162544
Category : Heat exchangers
Languages : en
Pages :
Book Description
Low Reynolds Number Flow Heat Exchangers
Author: Sadik Kakaç
Publisher:
ISBN:
Category :
Languages : en
Pages : 1016
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 1016
Book Description
Performance of a Plate Exchanger at Low Reynolds Number Flow
Author: M. N. Rathor
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The plate heat exchanger features an increase in the heat transfer coefficient by induced turbulence. The work presented here correlates the heat transfer and pressure drop characteristics of the exchanger at low Reynolds numbers. [Authors' abstract].
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
The plate heat exchanger features an increase in the heat transfer coefficient by induced turbulence. The work presented here correlates the heat transfer and pressure drop characteristics of the exchanger at low Reynolds numbers. [Authors' abstract].
Low Reynolds Number Flow Heat Exchangers , Proceedings of the Fourth NATO ASI on heat transfer, Ankara, Turkey, July 13 - 24 1981
Author: Kakac S Ed
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Analytical and Experimental Study of Fluid Friction and Heat Transfer in Low Reynolds Number Flow Heat Exchangers
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Heat Transfer at Low Reynolds Number
Author: John E. Porter
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 42
Book Description
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 42
Book Description
Reynolds Number Effects on Pressure Loss and Turbulence Characteristics of Four Tube-bundle Heat Exchangers
Author: William B. Igoe
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 34
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 34
Book Description
Numerical Simulations of Steady Low-Reynolds-number Flows and Enhanced Heat Transfer in Wavy Plate-fin Passages
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Extended or finned surfaces are widely used in compact heat exchangers to reduce the thermal resistance of air- or gas-side flows. Besides increasing the effective heat transfer surface area, geometrically modified finned surfaces also improve the heat transfer coefficient by altering the flow field. Wavy plate-fin surfaces have such properties and promote relatively high thermal-hydraulic performance. They are also attractive for their simplicity of manufacture and ease of use in compact heat exchangers. The current study numerically investigates the fluid flow and enhanced convection heat transfer in two-dimensional and three-dimensional wavy plate-fin passages with sinusoidal wall corrugations in the low Reynolds number regime. Constant property, periodically fully developed, and laminar or low Reynolds number forced convection are considered. The governing equations of continuity, momentum, and energy are solved computationally using finite-volume techniques. The solution procedure is based on the SIMPLE algorithm and a non-orthogonal, non-uniform grid. The influences of fin geometry (fin spacing, fin height, fin amplitude and fin length) on the enhanced heat transfer and fluid flow behaviors are investigated. The simulation results for the velocity and temperature distributions, isothermal Fanning friction f, and Colburn factor j are presented and discussed. The complex flow patterns in the wavy-fin channel are characterized by re-circulating and/or helical swirl flows with periodic flow separation and reattachment. Two flow regimes can be classified based on these results, namely, (1) low-Re streamline-flow regime where viscous forces dominate, and (2) high-Re swirl-flow regime characterized by flow recirculation and/or helical vortices. Heat transfer enhancement is observed in the swirl flow regime along with an increased pressure drop penalty, as a consequence of the periodic thermal boundary-layer thinning, strong flow mixing, and periodic generation and dissipation of vortices or re-circulating cells. In the streamline-flow regime, the flow and heat transfer behavior are similar to that in straight flow channel, though an enhanced performance is obtained. Also, results of flow visualization experiment for a two-dimensional wavy flow channel are shown to agree well with the numerical results. Finally, the computational methodology is extended to illustrate the flow behaviors in out-of-phase wavy flow passages.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Extended or finned surfaces are widely used in compact heat exchangers to reduce the thermal resistance of air- or gas-side flows. Besides increasing the effective heat transfer surface area, geometrically modified finned surfaces also improve the heat transfer coefficient by altering the flow field. Wavy plate-fin surfaces have such properties and promote relatively high thermal-hydraulic performance. They are also attractive for their simplicity of manufacture and ease of use in compact heat exchangers. The current study numerically investigates the fluid flow and enhanced convection heat transfer in two-dimensional and three-dimensional wavy plate-fin passages with sinusoidal wall corrugations in the low Reynolds number regime. Constant property, periodically fully developed, and laminar or low Reynolds number forced convection are considered. The governing equations of continuity, momentum, and energy are solved computationally using finite-volume techniques. The solution procedure is based on the SIMPLE algorithm and a non-orthogonal, non-uniform grid. The influences of fin geometry (fin spacing, fin height, fin amplitude and fin length) on the enhanced heat transfer and fluid flow behaviors are investigated. The simulation results for the velocity and temperature distributions, isothermal Fanning friction f, and Colburn factor j are presented and discussed. The complex flow patterns in the wavy-fin channel are characterized by re-circulating and/or helical swirl flows with periodic flow separation and reattachment. Two flow regimes can be classified based on these results, namely, (1) low-Re streamline-flow regime where viscous forces dominate, and (2) high-Re swirl-flow regime characterized by flow recirculation and/or helical vortices. Heat transfer enhancement is observed in the swirl flow regime along with an increased pressure drop penalty, as a consequence of the periodic thermal boundary-layer thinning, strong flow mixing, and periodic generation and dissipation of vortices or re-circulating cells. In the streamline-flow regime, the flow and heat transfer behavior are similar to that in straight flow channel, though an enhanced performance is obtained. Also, results of flow visualization experiment for a two-dimensional wavy flow channel are shown to agree well with the numerical results. Finally, the computational methodology is extended to illustrate the flow behaviors in out-of-phase wavy flow passages.