The release of heat stored in the pipe wall contributes to this behaviour. Computational simulations of the present experiments were performed using a spatially fully developed formulation of the equations for unsteady turbulent flow and heat transfer in a boundary layer utilising turbulence models of ...
The electrochemical technique with the ferri-ferrocyanide system has been used to obtain transient mass transfer coefficients for smooth pipes. In contrast to the analytical solution of the corresponding heat transfer problem, two distinct transient periods are observed. It is proposed that the first is...
I did some basic calculation from heat transfer book (conduction+convection) for pipe in radia direction and found TSur = 400K. But when i tried this in CFX by giving the above boundary conditions plus wall with heat transfer coefficient (h = 1/R: from analytical convection+conduction), it...
Under consideration is transient, convective heat transfer to a fluid flow within a pipe due to a sudden change in the temperature of the ambient medium outside the pipe. A solution is developed by the Laplace transformation, for the fastest portion of the transient, which gives the pipe wall...
The warm-up cycle for an automobile engine with an insulated exhaust pipe between the engine and the catalytic converter is considered. The mathematical model for the heat transfer in the insulated exhaust pipe is presented. An efficient numerical algorithm for this model is also constructed and th...
Conductive Heat Transfer of a Cylindrical Pipe or Layer Equation and Calculator Q = Rate of Steady State Heat Conductivity (W) S = Conduction Shape Factor (ft) which has the dimension of length, and k is the thermal conductivity of the medium between the surfaces. The conduction shape facto...
drag reducing turbulent pipe flowsheat eddy diffusivityfriction drag reduction ratioWeissenberg numberA new semi-empirical equation of heat eddy diffusivity in ... HK Yoon,AJ Ghajar - 《International Communications in Heat & Mass Transfer》 被引量: 5发表: 1986年 Experiment of heat transfer in osci...
An equation was derived for the calculation of heat and mass transfer coefficients in the case of pipe and channel flow, taking into account the experimental data for high Reynolds and Prandtl numbers. The equation is valid for the transition region and for the range of fully developed turbulent...
Step 2: Ordinary Insulation Ordinary insulation materials, such as fiberglass, cellulose, or mineral wool, utilize pockets of air trapped in their structure to reduce heat transfer. Air has low thermal conductivity and is not a good conductor of heat, so by trapping air within the insulation mat...
Amani, A numerical investigation of developing flow and heat transfer in a curved pipe, Int. J. Numer. Meth. Heat Fluid Flow 19 (2009) 847- 873.Nobari MRH, Amani E (2009) A numerical investigation of developing flow and heat transfer in a curved pipe. International Journal of Numerical ...