Like I said, circular "logic".
You can't equate an engine to the flow of a viscous fluid through a straight pipe, when the "pipe" friction is not what what the pressure drop actually reflects.
Given that you are pretty au fete with hydrodynamics, pick an oil line of (say) 15mm, and a metre length, and a flow rate of 4GPM, and calculate the pressure drop along the pipe...it's nothing compared to the pump discharge pressure...easy to prove, off you go...
Even the least scientific BITOGer acknowledges that the oil pressure is the resistance (backpressure)to moving oil through the bearings, not the flow restriction through the galleries.
As to bearing lubrication being non-hydrodynamic, the GF-6 specs, which are nearly totally aimed at very low viscosity (in particular HTHS) are showing that engines are moving INTO boundary lubrication in the search for economy, which is an increasingly common phenomenon, not common in previous designs and lubricants.
http://www.stle.org/resources/articledetails.aspx?did=1671
http://oil-additives.evonik.com/sites/dc...t-davidgray.pdf
You can't equate an engine to the flow of a viscous fluid through a straight pipe, when the "pipe" friction is not what what the pressure drop actually reflects.
Given that you are pretty au fete with hydrodynamics, pick an oil line of (say) 15mm, and a metre length, and a flow rate of 4GPM, and calculate the pressure drop along the pipe...it's nothing compared to the pump discharge pressure...easy to prove, off you go...
Even the least scientific BITOGer acknowledges that the oil pressure is the resistance (backpressure)to moving oil through the bearings, not the flow restriction through the galleries.
As to bearing lubrication being non-hydrodynamic, the GF-6 specs, which are nearly totally aimed at very low viscosity (in particular HTHS) are showing that engines are moving INTO boundary lubrication in the search for economy, which is an increasingly common phenomenon, not common in previous designs and lubricants.
http://www.stle.org/resources/articledetails.aspx?did=1671
http://oil-additives.evonik.com/sites/dc...t-davidgray.pdf