Algorithm 2.

Force balance, cellular velocity and position

Result Update cell positions
while t ≤ 60 min do
	for i = 1 to N(t) do
		for j = 1 to N(t) do
			if i = j then
				continue;
			end if
			${\mathit{F}}_{\mathit{\text{cca}}}^{\mathit{\text{ij}}}\leftarrow -c_{\mathit{\text{cca}}}\mathbf{\nabla }\phi ({\mathit{x}}_j-{\mathit{x}}_i;R_A^i+R_A^j)$
			${\mathit{F}}_{\mathit{\text{ccr}}}^{\mathit{\text{ij}}}\leftarrow -c_{\mathit{\text{ccr}}}\mathbf{\nabla }\psi ({\mathit{x}}_j-{\mathit{x}}_i;R_N^i+R_N^j,R_i+R_j)$
			${\mathit{F}}^i\leftarrow F^i+(F_{\mathit{\text{cca}}}^{\mathit{\text{ij}}}+F_{\mathit{\text{ccr}}}^{\mathit{\text{ij}}})$
		end for
		${\mathit{F}}_{\mathit{\text{ct}}}^i\leftarrow K(V,t)·[-c_{\mathit{\text{ct}}}\mathbf{\nabla }\phi ({\mathit{d}}_n^i;R_A^i)]$
		${\mathit{F}}_{\mathit{\text{rct}}}^i\leftarrow K(V,t)·[-c_{\mathit{\text{rtc}}}\mathbf{\nabla }\psi ({\mathit{d}}_n^i;R_N^i,R_i)]$
		${\mathit{F}}_{\mathit{\text{hap}}}^i\leftarrow \chi \mathbf{\nabla }f$
		${\mathit{F}}^i\leftarrow {\mathit{F}}^i+({\mathit{F}}_{\mathit{\text{cba}}}^i+{\mathit{F}}_{\mathit{\text{cbr}}}^i+{\mathit{F}}_{\mathit{\text{ct}}}^i+{\mathit{F}}_{\mathit{\text{rct}}}^i+{\mathit{F}}_{\mathit{\text{hap}}}^i)$
	end for
	for i = 1 to N(t) do
		υi ← Fi;
	end for
	$\mathrm{\Delta }t\leftarrow \frac{1}{\text{max}\Vert {\mathit{\upsilon }}^i\Vert }$;
	for i = 1 to N(t) do
		xi ← xi + υi · Δt;
	end for
	t ← t + Δt
end while