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Correlation Transfer Of Laminar Jet
- Sep 21, 2017 -

     Heat transfer depends on the macroscopic movement of the fluid micro-cluster. This is one of three basic ways of heat transfer. Most of the materials processed in the chemical production are fluids, and the heat and cooling of the fluids are included in the convection. In chemical production, convection heat is used to refer to the heat transfer between the fluid and the solid wall surface of the fluid.Laminar Jet

    This is in fact a heat transfer process that is common to the two basic heat transfer modes of convective heat conduction. For example, the heat transfer between the fluid in the wall heat exchanger and the side of the interlayer, the heat transfer between the solid material or the catalyst and the fluid in the reactor, is the heat transfer process.Laminar Jet

    According to the fluid in the heat transfer process there is no phase change, convective heat is divided into two categories: no phase change convection heat. The fluid does not occur during the heat transfer process, such as evaporation, condensation and other phases of change, such as water heating or cooling. According to the cause of the relative motion of the fluid particle, convective heat is divided into natural convection and forced convection. Natural convection is a flow caused by the different densities of various parts of the fluid (such as the upward flow of hot air around the radiator), and the forced convection is the flow of fluid under the action of external forces (such as pressure).Laminar Jet

   The high flow velocity in forced convection can accelerate the heat transfer, so it is widely used in engineering. There is a phase change convection heat. In the process of heat exchange with the wall, the fluid itself has Laminar Jetchanged in phase. This kind of convective heat transfer includes condensation heat transfer and boiling heat conduction.

    The movement of convective heat transfer mechanism has a strong influence on the heat conduction process. When the flow in the boundary layer is completely in laminar state, the heat transfer perpendicular to the flow direction can only pass through the internal heat conduction, but the flow of the fluid causes the temperature variation along the flow direction, which increases the temperature gradient at the wall, thus promoting the heat transfer. Laminar Jet

    When the flow in the boundary layer is turbulent, the flow structure near the wall includes the turbulent zone, the transition zone and the laminar layer. In addition to heat conduction, the heat transfer in the turbulent region perpendicular to the flow direction is mainly dependent on the intense mixing of the micro-groups at different temperatures, that is, convective heat. This transmission mechanism is similar to the momentum transfer mechanism in turbulent region.Laminar Jet