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In the current work the time evolution of baryon diffusion flow within thescope of second order relativistic hydrodynamic theory has been studied for a2-component quark-gluon system. The relaxation time for diffusion flow isestimated using the Grad's moment method of many particle kinetic theory. Thetemperature dependence of relaxation time for diffusion flow has been obtainedfor different quark chemical potentials. Finally, the diffusion equation hasbeen solved for a $1+1$ dimensional boost invariant system and the effect ofdiffusion flow has been studied on the thermal photon spectra in a baryon richenvironment. The present analysis on the role of baryon number diffusion ininfluencing the properties of hot QCD medium could be relevant for the baryonrich matter explorations in upcoming experimental facilities.

Relaxation of baryon diffusion flow in QGP medium and its impact on thermal photon spectra