Internal forced convection
From ThermalFluidsPedia
(6 intermediate revisions not shown)  
Line 1:  Line 1:  
  Internal heat and mass transfer have significant applications in a variety of technologies, including heat exchangers and electronic cooling. Internal convective heat and mass transfer can be classified as either forced or natural convection. An initial simple approach to internal convective heat transfer is to utilize the dimensional analysis  +  Internal heat and mass transfer have significant applications in a variety of technologies, including heat exchangers and electronic cooling. Internal convective heat and mass transfer can be classified as either forced or natural convection. An initial simple approach to internal convective heat transfer is to utilize the dimensional analysis to obtain important parameters and dimensionless numbers for the steady laminar flow of an incompressible fluid in a convectional tube <ref>Faghri, A., Zhang, Y., and Howell, J. R., 2010, Advanced Heat and Mass Transfer, Global Digital Press, Columbia, MO.</ref>, i.e., 
{ class="wikitable" border="0"  { class="wikitable" border="0"  
    
 width="100%" <center>   width="100%" <center>  
  <math>h=f(k,\mu ,c_{p},\rho ,u,D,x,\Delta T)</math>  +  <big><big><math>h=f(k,\mu ,c_{p},\rho ,u,D,x,\Delta T)</math></big></big> 
</center>  </center>  
{{EquationRef(1)}}  {{EquationRef(1)}}  
}  }  
  The local heat transfer coefficient is a function of the fluid properties (viscosity, μ; thermal conductivity, k; density, ρ; specific heat,  +  The local heat transfer coefficient is a function of the fluid properties (viscosity, μ; thermal conductivity, k; density, ρ; specific heat, c<sub>p</sub>), geometry (D), temperature (ΔT), and flow velocity (u). 
  In dimensionless form  +  In dimensionless form, 
{ class="wikitable" border="0"  { class="wikitable" border="0"  
Line 19:  Line 19:  
}  }  
The above relation indicates that the local Nusselt number for flow in a circular tube is a function of the Reynolds number, Prandtl number, and x/D. The goal of this chapter is to develop the heat and mass transfer coefficients for various internal flow configurations under different operating conditions.  The above relation indicates that the local Nusselt number for flow in a circular tube is a function of the Reynolds number, Prandtl number, and x/D. The goal of this chapter is to develop the heat and mass transfer coefficients for various internal flow configurations under different operating conditions.  
  +  
+  *[[Basics of Internal Forced ConvectionBasics]]  
+  *[[Fullydeveloped flow and heat transfer]]  
+  *[[Thermally developing laminar flow]]  
+  *[[Coupled thermal and concentration entry effects]]  
+  *[[Developing flow]]  
+  *[[Numerical solution of internal convectionNumerical solutions]]  
+  *[[Forced convection in microchannels]]  
+  *[[Internal turbulent flow]].  
+  
+  ==References==  
+  {{Reflist}}  
+  
+  ==Further Reading==  
+  
+  ==External Links== 
Current revision as of 13:47, 5 August 2010
Internal heat and mass transfer have significant applications in a variety of technologies, including heat exchangers and electronic cooling. Internal convective heat and mass transfer can be classified as either forced or natural convection. An initial simple approach to internal convective heat transfer is to utilize the dimensional analysis to obtain important parameters and dimensionless numbers for the steady laminar flow of an incompressible fluid in a convectional tube ^{[1]}, i.e.,
h = f(k,μ,c_{p},ρ,u,D,x,ΔT) 
The local heat transfer coefficient is a function of the fluid properties (viscosity, μ; thermal conductivity, k; density, ρ; specific heat, c_{p}), geometry (D), temperature (ΔT), and flow velocity (u). In dimensionless form,

The above relation indicates that the local Nusselt number for flow in a circular tube is a function of the Reynolds number, Prandtl number, and x/D. The goal of this chapter is to develop the heat and mass transfer coefficients for various internal flow configurations under different operating conditions.
 Basics
 Fullydeveloped flow and heat transfer
 Thermally developing laminar flow
 Coupled thermal and concentration entry effects
 Developing flow
 Numerical solutions
 Forced convection in microchannels
 Internal turbulent flow.
References
 ↑ Faghri, A., Zhang, Y., and Howell, J. R., 2010, Advanced Heat and Mass Transfer, Global Digital Press, Columbia, MO.