▁thin ▁films ▁can ▁be ▁thought ▁to ▁have ▁pressure ▁and ▁vis c ous ▁forces ▁acting ▁on ▁them . ▁ ▁Because ▁there ▁is ▁a ▁difference ▁in ▁velocity ▁there ▁will ▁be ▁a ▁difference ▁in ▁the ▁surface ▁tra ction ▁vectors . ▁Because ▁of ▁mass ▁conservation ▁we ▁can ▁also ▁assume ▁an ▁increase ▁in ▁pressure , ▁making ▁the ▁body ▁forces ▁different . ▁▁ ▁H yd rod ynamic ▁lub ric ation ▁– ▁characteristics : ▁ ▁Fl uid ▁film ▁at ▁the ▁point ▁of ▁minimum ▁thick ness ▁decre ases ▁in ▁thick ness ▁as ▁the ▁load ▁increases ▁ ▁Press ure ▁within ▁the ▁fluid ▁mass ▁increases ▁as ▁the ▁film ▁thick ness ▁decre ases ▁due ▁to ▁load ▁ ▁Press ure ▁within ▁the ▁fluid ▁mass ▁is ▁greatest ▁at ▁some ▁point ▁approaching ▁minimum ▁clear ance ▁and ▁lowest ▁at ▁the ▁point ▁of ▁maximum ▁clear ance ▁( due ▁to ▁diver gence ) ▁ ▁Vis cos ity ▁increases ▁as ▁pressure ▁increases ▁( more ▁resistance ▁to ▁she ar ) ▁ ▁Film ▁thick ness ▁at ▁the ▁point ▁of ▁minimum ▁clear ance ▁increases ▁with ▁the ▁use ▁of ▁more ▁vis c ous ▁flu ids ▁ ▁With ▁same ▁load , ▁the ▁pressure ▁increases ▁as ▁the ▁vis cos ity ▁of ▁fluid ▁increases ▁ ▁With ▁a ▁given ▁load ▁and ▁fluid , ▁the ▁thick ness ▁of ▁the ▁film ▁will ▁increase ▁as ▁speed ▁is ▁increased ▁ ▁Fl uid ▁fr iction ▁increases ▁as ▁the ▁vis cos ity ▁of ▁the ▁lub ric ant ▁becomes ▁greater ▁ ▁H yd rod ynamic ▁condition ▁– ▁Fl uid ▁velocity : ▁ ▁Fl uid ▁velocity ▁depends ▁on ▁velocity ▁of ▁the ▁journal ▁or ▁r ider ▁ ▁In