We developed a generic formalism to estimate the event rate and the redshift distribution of Fast Radio Bursts ( FRBs ) in our previous publication ( Bera et al .
2016 ) , considering FRBs are of an extragalactic origin .
In this paper we present ( a ) the predicted pulse widths of FRBs by considering two different scattering models , ( b ) the minimum total energy required to detect events , ( c ) the redshift distribution and ( d ) the detection rates of FRBs for the Ooty Wide Field Array ( OWFA ) .
The energy spectrum of FRBs is modelled as a power law with an exponent - \alpha and our analysis spans a range -3 \leq \alpha \leq 5 .
We find that OWFA will be capable of detecting FRBs with \alpha \geq 0 .
The redshift distribution and the event rates of FRBs are estimated by assuming two different energy distribution functions ; a Delta function and a Schechter luminosity function with an exponent -2 \leq \gamma \leq 2 .
We consider an empirical scattering model based on pulsar observations ( model I ) as well as a theoretical model ( model II ) expected for the intergalactic medium .
The redshift distributions peak at a particular redshift z _ { p } for a fixed value of \alpha , which lie in the range 0.3 \leq z _ { p } \leq 1 for the scattering model I and remain flat and extend up to high redshifts ( z \lesssim 5 ) for the scattering model II .