Nope its not possible.....force is required (Pressure)

Dear Pranav Kherdekar

This information is possible important for you.

A system for estimating engine exhaust pressure includes a pressure sensor fluidly coupled to an intake manifold of the engine, a turbocharger having a turbine fluidly coupled to an exhaust manifold of the engine, a control actuator responsive to a control command to control either of a swallowing capacity and a swallowing efficiency of the turbine, and a control computer estimating engine exhaust pressure as a function of the pressure signal and the control command. In an alternate embodiment, the system includes an engine speed sensor, an EGR valve fluidly connected between the intake manifold and the exhaust manifold, and an EGR valve position sensor. The control computer is operable in this embodiment to estimate engine exhaust pressure as a function of the pressure signal, the control command, the engine speed signal and the EGR valve position signal.

Sincerely,

Luis Tipanluisa

Dear L. Tipanluisa,

Sincere Thanks for the information.

Regards,

Pranav

The pressure is required.

Dear Pranav Kherdekar ,

I think you can get approximate value of pressure drop.

As far as I know, Nm3/s is the volume flow rate at standard temperature and pressure. Therefore you can get mole flow rate or mass flow rate of the gas. Hence you can use mass flow inlet with gas temperature condition for the inlets boundary condition. 

Additionally, in my experience, the inlet pressure also has small affect on pressure drop. So you can try several back pressures around maximum back pressure as pressure outlet boundary condition to see the influence.

best regards,