An example of <a href="https://en.wikipedia.org/wiki/convection" class="extiw" title="en:convection">convection</a>. Though the flow may be <a href="https://en.wikipedia.org/wiki/steady_flow" class="extiw" title="en:steady flow">steady</a> (time independent), the <a href="https://en.wikipedia.org/wiki/fluid" class="extiw" title="en:fluid">fluid</a> decelerates as it moves down the diverging duct (assuming <a href="https://en.wikipedia.org/wiki/incompressible_flow" class="extiw" title="en:incompressible flow">incompressible</a> or <a href="https://en.wikipedia.org/wiki/Mach_number" class="extiw" title="en:Mach number">subsonic</a> compressible flow), hence there is an acceleration happening over position. Self made (by <a href="https://en.wikipedia.org/wiki/User:Ben_pcc" class="extiw" title="wikipedia:User:Ben pcc">Ben pcc</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>).
<a href="https://en.wikipedia.org/wiki/User:Ben_pcc" class="extiw" title="wikipedia:User:Ben pcc">Ben pcc</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
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