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Expoente de Lyapunov para um Gás de Lennard–Jones - CBPFIndex

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E. Unida<strong>de</strong>s reduzidas 125<br />

Tabela E.2: Unida<strong>de</strong>s físicas e reduzidas <strong>de</strong> alg<strong>um</strong>as gran<strong>de</strong>zas <strong>de</strong> interesse <strong>para</strong> os gases<br />

nobres Ar e Ne . Consi<strong>de</strong>ramos <strong>um</strong> único valor <strong>de</strong> temperatura, T ∗ = 1.50,<br />

e três valores típicos <strong>para</strong> a <strong>de</strong>nsida<strong>de</strong>. Pressão estimada com a lei dos gases<br />

i<strong>de</strong>ais, PV = NκBT, tempo médio entre colisões sucessivas τ, através da<br />

equação (5.8). Em nossas simulações, utilizamos δt ∗ = 0.001 como passo <strong>de</strong> integração.<br />

Ar Ne<br />

σ 3.40 × 10 −10 m 2.74 × 10 −10 m<br />

ε 1.65 × 10 −21 J 5.00 × 10 −22 J<br />

m 6.63 × 10 −26 Kg 3.34 × 10 −26 Kg<br />

T ∗ 1.50 1.50<br />

T ∼ 179K ∼ 54K<br />

δt ∗ 0.001 (1 passo) 0.001<br />

δt 2.16 × 10 −15 s 2.24 × 10 −15 s<br />

v ∗ rms 2.12 2.12<br />

vrms ∼ 335 m/s ∼ 260 m/s<br />

ρ ∗ 0 0.01 0.01<br />

ρ 0 2.54 × 10 26 /m 3 4.86 × 10 27 /m 3<br />

τ ∗ 10.6 (∼ 10 000 passos) 10.6<br />

τ 2.28×10 −11 s 2.38 × 10 −11 s<br />

P ∗ 0.015 0.015<br />

P 6.3×10 5 N/m 2 ∼ 6.3atm 3.6 × 10 5 N/m 2 ∼ 3.6atm<br />

ρ ∗ 0 0.05 0.05<br />

ρ 0 1.27 × 10 27 /m 3 2.43 × 10 27 /m 3<br />

τ ∗ 2.12 (∼ 2 000 passos) 2.12<br />

τ 4.58 × 10 −12 s 4.75 × 10 −12 s<br />

P ∗ 0.075 0.075<br />

P 3.1×10 6 N/m 2 ∼ 31atm 1.8 × 10 6 N/m 2 ∼ 18atm<br />

ρ ∗ 0 0.50 0.50<br />

ρ 0 1.27 × 10 28 /m 3 2.43 × 10 28 /m 3<br />

τ ∗ 0.21 (∼ 200 passos ) 0.21<br />

τ 4.58 × 10 −13 s 4.75 × 10 −13 s<br />

P ∗ 0.75 0.75<br />

P 3.1×10 7 N/m 2 ∼ 310atm 1.8 × 10 7 N/m 2 ∼ 180atm

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