Experimental study of forced and free convective heat transfer in the thermal entry region of horizontal concentric annuli

• Main Authors: Mohammed H.A., Campo A., Saidur R.
• Other Authors: 15837504600
• Format: Article
• Published: 2023
• Subjects: Forced free convection; Horizontal annulus; Thermal entry length problem; Forced convection; Natural convection; Nusselt number; Pipe flow; Reynolds number; Stainless steel; Tubes (components); Vehicular tunnels; Axial distance; Combined convection; Concentric annuli; Constant wall heat flux; Convective heat transfer; Dimensionless variables; Empirical correlations; Entry length; Entry region; Experimental setup; Experimental studies; Free convections; Heated lengths; Inner tubes; Laminar airflow; Local Nusselt number; Long tubes; Radius ratio; Re numbers; Short tube; Surface temperature distribution; Thermal entrance; Heat exchangers

Forced and free convective heat transfer for thermally developing and thermally fully developed laminar air flow inside horizontal concentric annuli in the thermal entrance length has been experimentally investigated. The experimental setup consists of a stainless steel annulus having a radius ratio...