Swimming speed of a Brinkman sheet
= Swimming speed of a Brinkman sheet
{title2=$U=\tfrac12b^2k\omega\sqrt{1+(\alpha/k)^2}$}
The leading fixed-stroke speed of a transverse <Brinkman swimming sheet> is enhanced over the pure-fluid value by $\sqrt{1+(\alpha/k)^2}$. It follows from the mean displaced-boundary <velocity> and zero mean traction. The expansion is at fixed screening parameter and does not assert an enhancement at fixed available motor power.